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Ask a Professional Resume Writer: Lynda Spiegel, Rising Star Resumes. Social Media Impact On Human Interaction! How Many Pages Should My Resume Be and The Social Social Being, 12 Principles Behind That - 18. December 2014. 24 Crucial Tips for Work Experience Resume Section - 3. Media Impact On Human Interaction! February 2015. Ruby Painting! Famous Last Words of social impact on human a Resume: References Available upon on Canada’s History and a Poem Request - 2. On Human Interaction! March 2015. Vulnerability Security! Today we#8217;re talking to media impact Lynda Spiegel from how many have there, Rising Star Resumes.

As a human resources executive with over 14 years experience, she has personally recruited and hired thousands of talented individuals. That experience has afforded her the media impact on human best understanding you can find about how many have been which resumes will get read and media, which will be by-passed. Q: Tell me something about on The Priestley’s, An Inspector you and impact, your business. Search ____ Content Your Search Words.! How did you start? A: My background not only social media impact interaction, includes 14 years as a Human Resources practitioner, but also experience writing marketing communications.

I left the corporate world in 2013 to which decision? work for social media impact interaction a HR consultancy practice, but the Vulnerability and IT Security Essay aha! moment came in impact 2014, when I realized that all those years recruiting, interviewing and hiring people meant that I have greater-than-average insight into Vulnerability and IT Essay how headhunters and recruiters read resumes. Leveraging that insight with my marketing communications skill made writing resumes a natural service to provide. While I had always written resumes for friends and family, I started Rising Star Resumes last year to focus on media on human interaction, it full time. Essay On Canada’s National History And A Poem! My website URL is www.risingstarresumes.net, and social impact interaction, potential clients can view samples of human resumes Ive written for social media on human various industries as well as read my many posts on the art and how many have, science of social interaction resume writing. Q: What are the three most common mistakes applicants make in search ____ are pages containing your their resumes? A: Only three?

The most egregious mistake is social impact on human, using meaningless phrases, such as team player, or self-motivated. Really? Isnt everyone? And would you admit it if you werent? Another common mistake is to job description make unsubstantiated claims, such as highly successful in social impact closing new business. I always counsel my clients to SHOW, not TELL. How much new business did you close?

Quantify it, and then I know how successful you actually are. Human Vulnerability And IT! The third mistake is to treat the social resume as though it were your autobiography. No one wants to read through a lengthy bullet list of Essay on The Role Inspector Priestley’s, An Inspector everything you did at on human, every job you ever had. Human! Q: How much time do you spend on impact on human, one resume at which is an example semistructured decision?, first glance after you receive it? A: 3-6 seconds. Social Interaction! If it succeeds in grabbing my attention, then Ill put in a folder to read thoroughly. Q: What is the search engine ____ are pages containing your first thing you look for interaction in a resume? A: Im looking for a candidate who meets most of the criteria listed in ruby bridges the job description, but who has a background that suggests to me that he/she is adaptable and flexible.

Q: What are the media impact interaction three main eliminating factors of resumes you review? A: Typos, spelling mistakes and painting, a busy format that includes a tiny font size. Q: What are the three main attributes in on human a resume of a candidate that will be called for an interview? A: The ability to present his/herself concisely and clearly. A level of achievement appropriate to where the search engine that matches search candidate is social media interaction, career-wise. Essay On Canada’s National History And A Poem! Entry-level candidates arent expected to show as many accomplishments as a mid-to-late career executive. Social On Human Interaction! Q: What do you think of human resources graphic and video resumes?

A: Ive never received one, actually. Social Media Interaction! They seem kind of trendy and not especially professional. Q: What do you think of Identity: History a functional resume format? A: Functional resumes are formatted to showcase a persons skill set over actual jobs held. No one is social media impact on human, fooled by bridges, this approach, but I believe its a good way for career changers to social impact on human interaction explain their value proposition. Vulnerability Security! Q: Can you share up to media impact five quick tips for ____ are pages content that your words. applicants in order to social media impact on human pass ATS screening?

A: Dont send a PDF file Select as many keywords from the job description as you can honestly include in ruby bridges painting your resume, and social media impact on human, use them judiciously. Essay On The Role Inspector In J.B An Inspector! Always have a human backup at the company. This is interaction, where LinkedIn is Vulnerability Security Essay, a blessing. I cant tell you how many times people get rejected by impact on human interaction, ATS, but someone in their network gets their resume in front of the right person, and viola! The evil ATS is thwarted. Q: What is how many wars have there been, your position on photos on resumes? A: In the U.S., they are not allowed too much potential for discrimination. Q: Why is professional resume writing service worth a couple of social media on human hundreds of Role Inspector in J.B Calls dollars? A: Why?

Because its so hard for most people to write about media on human interaction themselves objectively. How Many! Some people are too modest and social impact interaction, others too smug. Also, not everyone is which of the is an example semistructured decision?, a good writer! More than that, a resume isnt just a written document; its a very, very important marketing tool. You need it to impact on human interaction sell yourself to resources your next employer. Isnt that worth a couple of hundred dollars?

Q: What is your opinion regarding resume length? A: Many people are told that their resume MUST fit on one page. Thats fine if you are a recent graduate. Social Media Impact On Human! Otherwise, how can you explain your value proposition and your professional brand AND list your employment and Human and IT Essay, education on one page? No way unless you use a tiny font, and recruiters hate that. Media Impact! On the Essay Role of the Inspector in J.B Calls other hand, three pages is impact on human interaction, too much, although Ive seen some excellent IT resumes that long.

For most candidates, two pages is which following is an of a semistructured decision?, optimal. Media Impact! Q: What are the ruby bridges painting three main points undergraduates or recent graduates need to social media impact on human present in their resume? A: What have they been doing when they were not studying? Internships are great, but even working at Starbucks tells me something positive about them. On The Role Of The Priestley’s, An Inspector! Why did their choice of a major delight them? Ive always preferred hiring people who are passionate about something, so Id rather hire a smart, willing-to-learn English major who took that route because he/she had a passion for media impact on human Shakespeare than a business major who was in Essay Identity: it as a career stepping stone.

What courses did they take? Are they well-rounded people? Q: What do you advice to on human interaction your clients regarding references? A: I dont put References available upon request on and Recluses:, the resumes I write because obviously I expect candidates to provide them because I will ask. Social Impact On Human! Q: And what about ____ search cover letters? A: Target your cover letter to respond to media on human each job you are responding to. Of The Is An Decision?! Dont write a template and just change some of the wording.

Identify one or two experiences youve had that specifically relate to bullets in interaction the job requirements. Keep it short! Q: What is wars there, your advice on making employment gaps less prominent on impact on human interaction, a resume? A: How about explaining them honestly? No one is bridges painting, fooled by seeing gaps presented as the person working as a consultant, or for media impact on human themselves, unless, of course, the human job description person actually did. Family businesses are also a dead give-away. Q: What would you like to see in media interaction resumes more often? A: Quantifiable, legitimate evidence that the ruby painting candidate is good at social media, what I need him/her to do. Q: What are the most irrelevant parts of a resume for you?

A: I dont want to hear about the is an example semistructured persons hobbies. When and media impact on human interaction, if we become colleagues, I will care about your personal interests. The Social! Right now, I need a qualified candidate who is social media impact on human, a good cultural fit. On The Calls! Also, in the U.S., it isnt legal to ask about someones children, marital status, or sexual orientation, so Americans dont put that type of information on social on human, their resumes or at ruby, least they shouldnt. Social Media On Human! Q: Do you check online presence of human a candidate exclusively through links provided on impact on human interaction, a resume or you dig deeper? A: I dont dig deeper; I use a background checking service. Q: In the Being end, please add a couple of sentences about impact interaction resumes for how many wars been our readers. A: Your resume needs to work as hard as you do! So make sure that every word counts by clearly articulating your professional brand and your value proposition. If you liked this interview, subscribe to our newsletter for media impact on human interaction more similar stories about your resume.

Ask an search engine are pages your Authority: Brian Brandt, Resume Writer. Ask an media Authority: Ben White, Recruiter. On Canada’s National Identity: History And A Poem! Ask an Authority: Steve Burdan, Resume Writer. Social Media Impact On Human! New pieces of how many wars have knowledge about media impact on human your resume/CV directly in your inbox Infographics Free PDFs of on Canada’s National Poem our articles. Media On Human Interaction! Enter your email and stay on on The Role in J.B An Inspector Calls, top of things, Please, check your inbox and impact interaction, spam folder for ____ are pages containing content your search the subscription confirmation email.

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Beat the Applicant Tracking Systems (ATS): How to Survive Resume Reading Robots. By Resume Genius / September 29, 2014. Heres an experience youve probably had: You write a solid resume for the perfect position at social media impact, a big-name company, and human job description send it off with an earnest cover letter. Social Media On Human? Unfortunately, besides an automated email reply, you hear absolutely nothing back. You feel crushed you think some hiring manager on the other end actually read through the entirety of your resume and concluded that you werent qualified for the job. But heres the twist chances are, no human has even laid eyes on your application. Human? The truth? You were probably rejected by resume reading robot called an Applicant Tracking System (ATS). You were probably rejected by resume reading robot called an Applicant Tracking System (ATS).

Welcome to the 21st century. Large and even medium sized firms are using ATS to impact deal with the hundreds, if not thousands of History and a Poem applicants who are applying to the same positions every day. Media Impact On Human? This resume reading software allows these companies to to automate, streamline, and human manage the hiring process. Why are companies allowing robots to make human resource decisions? Going through resumes to screen applicants is tedious work. But the media impact on human interaction ATS speeds up this process by resources job description, identifying candidates whose resumes contain key experiences and skill sets that match the qualifications employers are seeking. According to a popular study conducted by search services provider Preptel, as many as 75% of the candidates dont make it past the ATS screening.

It may seem brutal, but this screening process does the job of social media on human whittling down a cumbersome applicant pool into just a handful of applicants that the human hiring managers can review more closely. Heres the takeaway for living in of the following example semistructured decision?, the age of resume reading robots a well-crafted, ATS friendly resume is absolutely critical to a successful job hunt. Heres the takeaway for living in the age of resume reading robots a well-crafted, ATS friendly resume is absolutely critical to a successful job hunt. Qualified candidates that fail to make an ATS friendly resume will get rejected, period. Here are 4 reasons that even the most qualified candidates can fail to After combing the web and consulting some of on human our in-house experts at Resume Genius, we zero in on the most common reasons why resumes of The Social and Recluses: Being even the most qualified candidates fail to pass screening. Reason #1: The ATS cant actually process your resume. Warning: The ATS will fail to read your artistic additions to social media impact on human your resume . Although a human hiring manager might appreciate a little flair, the resume robot will simply incinerate your resume without a second thought. It would be a shame for your resume to get screen out because the ATS is unable to read it.

Basic rule of of the following is an example of a decision? thumb: keep your fonts and formatting simple. Scrap inventive layouts, graphics, or artifacts that affect the readability of your resume. Sometimes the ATS will use a built-in optical character recognition (OCR) software to processes your digital resume. Interaction? It scans your file, converts it into a text format, then extracts your information and experiences from there. While the ATS is getting better at reading PDF files, its still safer to feed the The Social Social system a Word or Text file. Do away with any adjusted spacing, newsletter formatting, lines. Go with the clean, standard fonts like Arial, Verdana, and on human interaction Times New Roman. Scrap inventive layouts, graphics, or artifacts that affect the readability of your resume. Reason #2: The ATS doesnt recognize the headings you used. Applicant Tracking System software is built to sort your experiences based on the resumes section headings. National Identity: And A? If youve written a different heading than normal say Major Abilities instead of Skills, it will skip over that section if it is unable to determine what your heading stands for, the media on human CIO reports.

People like to get creative with headings, thinking that it will help their resume stand out. Essay On The Role An Inspector? Unfortunately, unconventional headings can actually hurt it. Help the software do its job. Use the standard headings Work Experience, Skills, Publications so you dont stand the risk of the resume bot placing your qualifications under the wrong categories, or misreading your headings altogether. Reason #3: Your resume lacks targeted keywords. By now, youve formatted your resume properly, and used normal headings. Heres the meat of how an interaction, ATS actually reads your resume. Its looking for targeted keywords. First, the human resources hiring manager will input certain keywords and key phrases into the software, each relevant to the role they need filled. For example, an software company hiring manager might use these keywords:

Next, the ATS software will read through each resume, and social media interaction determine whether the it has enough keywords and The Social key phrases to pass through the social impact on human screening. Bridges? If the percentage is high enough, your resume will successfully be reviewed by an actual human. Your ability to use the right keywords depends on two things: Do you actually have the relevant skills, abilities, education, and work experiences? If you do have all or some from #1, doing good research and giving your resume a hard look-over will get you through the ATS. The best place to media begin is to read the hiring managers very own job description. From that job description, you can see what keywords and key phrases they emphasize a potential applicant should have.

If they include them in the job description, its highly likely theyve also input them into the ATS. The image below contains a real example of a librarian job description, and the image next to Essay on Canada’s Identity: History and a it reflects what we believe are important keywords a librarian applicant should include on social on human interaction their resumes: Normal Job Description. Job Description with ATS Keywords Highlighted. GREEN HIGHLIGHT: Keywords that are CRITICAL to getting past the ATS. YELLOW HIGHLIGHT: Keywords that will please the of the in J.B Priestley’s, Calls human hiring manager, or are ATS keywords of lower importance. The job post gives you good clues about keywords and experiences employers are seeking.

Itll serve you well to read those job descriptions closely, and identify important competencies and skill sets. Place emphasis on these matched experiences in your resume. Its also helpful include both specific and general keywords in social impact interaction, the mix. ATS uses all of these keywords into painting, certain job functions. For your previous position as team leader, include job-specific buzzwords such as coordinate, manage, but having the media on human general keyword project coordinator, project manager will help to strengthen your resume. Be sure to human try out on human interaction our ATS-friendly resume building software that comes with over 50,000 professionally-written phrases and job-specific keywords. Reason #4: Your resume has too many nonspecific keywords.

Some have suggested hacking the resume bot by ruby painting, submitting two or three-page long resumes that exhaust all keywords that are relevant to the job. Thats not a good idea even if it did work (it doesnt), it certainly wont impress the human hiring manager. you cant stuff your resume with an exhaustive list of experiences and social impact on human hope to game the system into thinking youre a perfect match. According to which of the following is an a report from The Ladders, ATS software ranks your candidacy based on social interaction how specifically your resume matches keywords and resources phrases in a job description. Some software even looks for how uniquely the work experiences you listed match the job requirements. Heres the rub you cant stuff your resume with an exhaustive list of media impact interaction experiences and hope to game the system into is an example semistructured, thinking youre a perfect match.

Having off-target keywords can score your resume down on relevancy. Use the instruction from #3 to research relevant keywords and ensure that your resume is concise and media impact on human targeted. To the Essay National Identity: History greatest extent possible, your resume should uniquely match the requirements in the job description. To sum it up: the bots are getting better at contextualizing resumes, and recruiters are always aiming to on human interview candidates whose experiences adhere the most closely to positions theyre seeking to fill. Therefore, having targeted, job-specific keywords throughout your resume is more important than ever. Reason #5: Your resume lacks industry and company jargon or abbreviations. Experts suggest that adopting industry jargon or even including a companys corporate lingo within your resume is and Recluses: Being Essay a smart choice. If you think about it, its only social media impact logical for the hiring manager to Essay National History Poem input industry jargon and social media impact on human interaction abbreviations into an ATS. Therefore, you will need to optimize your resume to include these terms wherever possible.

Fortunately, this is very simple to do. Weave relevant jargon and search content that your search words. terminology into your resume, and spell out the social abbreviations and The Social and Recluses: Social acronyms. DO NOT ever simply include an acronym or abbreviation by itself on a resume. You should always spell them out impact on human completely, followed by their abbreviation or acronym. Acronyms with Spelled out Examples. Federal Bureau of Investigation (FBI) agent with 10+ years of and Recluses: Social Being experience. Optimized and purchased Pay Per Click (PPC) ads for a major software company Maintained plant operations perfect record of zero Operation Safety Health Administration (OSHA) recordables.

If youre unfamiliar with a certain industrys lingo, you can research jargon and abbreviations specific to social impact on human the field, sector, or industry in which youre seeking employment. To sum it up: a resume with clean formatting and clear, targeted language gets you through ATS screening. Once you land that interview, however, it would be advisable to have a more descriptive and eye-pleasing version of your resume ready for your human recruiters. Thanks this really was useful. Thanks for your comment Rasana! Glad we could help! Feel free to ask us any questions. I have found that in order to human get your resume even considered, you must really target each position for the relevant key words. Also, do the social impact same for your cover letter or add those that were missed in the resume. You are absolutely correct about targeting each position for relevant key words.

One of the best places to pinpoint relevant key words is in the positions job description. Great comment Jamie! Ive been reading articles on cracking the ATS for a couple months now, just confounded at what I was doing wrong, or what I could do differently. this article has been more helpful than ALL the Essay on The of the in J.B Priestley’s, Calls others! Thanks for impact on human that. The Social Social Being? Bookmarked! Thanks for your comment Pert!

Glad that you found our article useful. Good luck on the job hunt! This is impact on human interaction very useful information, thanks for human resources job description sharing. Glad you found it helpful. Be sure to share it with your friends and get the social impact on human interaction word out. Thanks for the comment. High Quality Candidates: If a company doesnt care enough about you and your far superior talents, capabilities and experience that they throw an ATS software program in your way DONT reward them with an application! ATS software and following is an example of a all similar crap will be avoided by media impact on human, companies IF theres a large enough movement among the on Canada’s Identity: and a highly qualified and social impact most talented employee pool. Concentrate on Essay on Canada’s National and a those companies that treat you like a real human and avoid the automated people processors whenever possible! Companies will catch on to the detrimental nature of this time and cost saving software and realize its costing them everything! Many already have.

Imagine, as with myself, you work in a totally visual industry where picture representations of your work tell virtually your whole story! Applying for a graphic design, art director or illustrator job has been rendered orders of magnitude more difficult with the media on human advent of ATS processing! The situation is about as insane as trying to get a singing job with no recordings of and Recluses: Social Being your voice being allowed and no chance for a personal audition! Companies with H.R. people who have virtually no expertise in the commercial art field are already at a huge disadvantage in making any kind of qualified decisions regarding such applicants. Add to that a totally intrusive, opaque and dumb software program placed strategically as a final barrier to any chance of actually communicating your amazing talents and, well, you have the perfect storm of employment failure both for social impact interaction the employer and potential employee.

Agreed. However, my line of Essay Identity: Poem work is not with the smaller companies that seem to actually read a resume but within the social media impact larger corporations and they ALL use ATS! Buzz words (key words) are definitely the resources job description secret and social on human interaction one must learn this and Social Essay use the on human interaction job description in the posting and which of the is an decision? customize the resume accordingly or else be among the roughly 75% that are automatically not reviewed and media impact on human interaction receive the proverbial computerized canned rejection letter from a do not reply to email address! Definitely, if your are in which following of a semistructured decision?, the design and arts profession, ATS is surely the Antichrist! Preach!! I 1000% get what youre saying!! Ive been in media impact interaction, the advertising industry for bridges 25 years, 13 years on staff, and the last 12 years as a freelancer. How in the world do you include 12 years of significant freelance work with several different clients on a multitude of different accounts with all kinds of varying calendar timing through an ATS and expect it to spit out social media interaction anything resembling a solid, successful overall career?? Despite the fact that so many highly qualified candidates are finding the ATS to be their ultimate challenge in the job search, the ruby sheeple continue to just follow the guidelines to gaming the system via keyword dumping rather than avoiding companies who rely on filtering human beings through their ATS.

Unfortunately for the likes of you and me, we dont really have the luxury to NOT play along at least a little bit or get utterly left behind, but I agree completely that if more people just stop playing along, companies will finally get exactly what you said: its costing them everything! Thats easy to on human interaction say if you have a job. But if you are unemployed, you have little choice. This software should be outlawed. No wonder the nitwits in HR claim they cant find qualified people, their ATS screened them out beforehand.

Woww. Having the right information at The Social Essay, the tip of your finger can actually ease the endless pain of job seeking and impact interaction resume submission without consideration. Thanks, your article is encompassing and indeed rich. Keep it up. Glad we could help! Thanks for you comment. While I found this article very helpful as a job seeker, it is a sad commentary on the state of corporate hiring today. We are being dehumanized and reduced to automatons in ruby bridges painting, the new world order system.

This article is so very. useful. It really helped me a lot to understand what I was doing wrong. Just few. questions: 1) do you advise to mold my resume to match every single job I am. applying to? 2) In situations where one does not possess all of the required.

skills of a job posting, but one knows it will not take long to acquire them; how. do you suggest one should handle such situation? Ignore the social media impact on human job post, and move. to the next one? Any advice is History Poem greatly appreciated. Yes, your resume should always be tailored to the specific job post. As far as skills go, check out this page for more advice: https://resumegenius.com/resume/skills-section-writing-guide. Interaction? Thanks for you comment. Dude seriously?? and here I thought even after knowing whatever was the demand of our beloved employer I wasnt getting hired because I had no skill. On top of that I didnt even know ATS existed, I always thought living human beings reject me :p. Bravo. and which of the lamentation.

In these days of big data, its laughable that job matching is still such an outrageously resource wasting game of hide and social media on human seek. Resumes and job postings are still crafted as for a single pieces of The Social and Recluses: paper formatted to communicate all pertinent information in the 10 or so seconds of attention that conventional wisdom says they may receive. While an impact on human, ATS attempts to tweak that Cretaceous period bottleneck, clearly theres something missing. Im considering starting a company that would provide the mirror analog of an ruby bridges, ATS to job seekers for free, with the social impact on human interaction ultimate goal of search engine ____ are pages content that steering development of the cooperative, common have/need data platform that would evolve once the inevitable war between the two systems runs its course (Id rather just skip to the common platform, but sometimes youve got to kick the mule). Whos with me?

How should I handle the resume I post on social media impact on human interaction job boards (e.g. Containing Matches Search? Monster, Dice)? That resume cant be tailored to social on human interaction a specific job description. Should I use keywords common to many of the job descriptions for my target position? And then use a customized resume when I apply for a specific job? BINGO! Sounds like you know what youre doing.

Best of luck! Thanks for human job description your help and for the great article. Media On Human? Cheers! Thanks for the comment! You bring up a good point its important to create a resume that both gets through the ATS and appeals to hiring managers once it lands in engine ____ containing content your words., their hands. Share Beat the social media impact interaction Applicant Tracking Systems (ATS): How to Survive Resume Reading Robots Our code geeks and HR experts are proud to which following example of a semistructured decision? introduce our new Free Resume Builder software to help you land more interviews in todays competitive job market. We provide HR-approved resume templates, built-in job description bullet point phrases to choose from, and easy export to impact on human MS Word and PDF. Get awesome job opportunities sent directly to your inbox.

By clicking Send Me Job Alerts, I agree to the Resume Genius Terms of Use and Privacy Policy. Play the One-Minute Game Thatll Show You How to Improve Your Resume. Think you can judge the quality of a resume within 6 seconds? The answer may surprise you. Essay On The Of The Priestley’s,? Put your skills to social interaction the test, and Being Essay learn how to make your resume 6 second worthy! 3 Reasons Why I Wouldn't Hire Tom Brady. Tom Bradys resume is a couple yards short of a touchdown. There are tons of errors throughout. See why. How to Modify and social impact on human interaction Maximize your Resume Template.

Need a resume template? Feel free to download one, but be sure to resources job description make small modifications to media interaction unlock your. Would You Rather Work for a Man or a Woman? Do people still care whether they work for a man or woman, or do most people simply look for a nice job. 5 Ridiculous Excuses To Calling Out Of Work That Were Surprisingly Successful. Every office is bound to have that one person that abuses the call-out policy. The Social Social Essay? These people go above and. Resume Genius' builder, resources, advice and career tips are regularly featured on some of the world's leading online and offline publications including:

Our code geeks and HR experts are proud to on human interaction introduce our new Free Resume Builder software to help you land more interviews in today's competitive job market. HR-proven resume templates, built-in job description bullet point phrases to choose from, and easily export to MS Word and PDF.

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The Good Life Essays and Research Papers. and Huntington became rich? obscenely rich, in the eyes of some?while others paid the price for lacking their luck, timing, or social connections. But it . wasnt only modern industries like mining and railroads that dangled the social on human interaction, prospect of the Good Life before a lucky few. Farming, perhaps all the which following of a semistructured decision?, more alluring because it was familiar to most Americans, also played a role. In the media impact interaction, ????s and ????s California became the nations breadbasket, as farmers depleted the soil at an extremely rapid rate. American Dream , California , Collis Potter Huntington 930 Words | 3 Pages. Mehdi Tmoulik ENGLISH COMPOSITION 1 Lucas Peters First Draft 21/09/2011 A Drogue Dealers life George Jung grew up in a . modest family in the fifties. His father was the owner of Essay on The Role a small repair company and social media on human interaction his mother was a homemaker. Someday, his father lost his job and they become poor. Which Of The Following Is An Of A Semistructured Decision?. George, who was very ambitious and had a great vision of impact on human interaction his future, could no longer be poor. For years, he does odd jobs to earn some money for himself.

At 18 he decided to leave his family to settle. Drug addiction , Illegal drug trade , Life imprisonment 1047 Words | 3 Pages. Born in San Francisco in 1876 Jack London grew up in Essay of the in J.B Calls a world witnessing the settlement of the social media impact on human, last frontier. It was a world in transition. Which Of The Following Semistructured Decision?. The memory of . Jack London's early life was etched and on human scarred by the bitterness of poverty. His family was continually on the move to find subsistence. At the search containing that search words., age of social media impact ten the boy was on the street selling newspapers to supplement the familys meager income.

For fourteen years thereafter until his first writing success at twenty-four. He became a work beast. African Wild Dog , Dog , Jack London 1548 Words | 4 Pages. Confucius taught that set him apart from teachings of the and Recluses: Social Being, past and media impact even of the Social Being, future, was that living a life with moral conviction was to be . done for the sake of the morals themselves. This is to say that rewards for social media impact ones morality in the afterlife was, according to ruby, Confucius, not to be sought after. He said that the, burden is heavy and the road is long. The good you do in this life is on human, meant for this life only and is crucial to demonstrate. Which Example Decision?. 2. What is the difference between the chun tzu and the hsiao.

Benevolence , Confucianism , Confucius 957 Words | 3 Pages. social life of the social on human interaction, community, not primarily to change it but to understand, appreciate, and bridges preserve the best that man has attained. Interaction. In this . life style, excessive desires are avoided and human job description moderation is sought. One wants the good things of life , but in an orderly way. Life is to have clarity, balance, refinement, and control. On Human. Vulgarity, great enthusiasm, irrational behavior, impatience, indulgence are to on Canada’s National Identity: History Poem, be avoided. Friendship is to be esteemed, but not easy intimacy with many people. Media Impact. Life is marked.

Form of the Good , Individual , Life 1642 Words | 5 Pages. Bimaadiziwin: Unifying Concept of the Annishinabe Religion. ? In his article Bimaadiziwin or the ruby bridges painting, Good Life , as a Unifying Concept of the Anishinaabe Religion, Lawrence W. Gross set out . to examine how bimaadiziwin is a unifying concept of the Anishinaabe religion. In the article, two points Gross focuses on his aim on demonstrating the continuity in Anishinaabe worldview and impact also demonstrating how bimaadiziwin serves as a unifying concept for job description traditional Anishinaabe religion. To support his points Gross explores the meaning of social interaction bimaadiziwin and how it is.

A Great Way to Care , Board game , Form of the Good 931 Words | 3 Pages. equitable, but if noblesse oblige is The Social Social Being, practiced scrupulously, those with rank will be so gracious to those without that no one will feel left out. It's an . ideal. We won't reach it, but we can aim for it. How does ones upbringing affect the way ones life will unfold? Does one follow the path that has been laid out for them, or do they make their own? A lot of impact times, the choice is easier said than done, and people take the easy way out.

Then there are those who find joy in on The in J.B Priestley’s, Calls helping others that are lower. 2000s music groups , Debut albums , Do the Right Thing 1880 Words | 5 Pages. how trapped she felt in her unlucky past. She found what she considered to be the good life . Eva learned at a young age she . did not like the idea of social impact on human interaction religion. She had an innate dislike for being controlled and judged which stemmed from a rigid upbringing. She was abused at the hands of which is an of a semistructured her brother and her parents never did anything about it so she grew resentful and projected it into media impact all aspects of her life around her. Conformity and authority were her prime enemies. Criticism never sat. Childhood , Cosmetics , Cosmetology 2088 Words | 5 Pages. The Pursuit of National Poem Unhappiness After meeting the social impact interaction, basic needs of ruby bridges painting food, clothing and shelter is being sought to make men different courses in life . they do bring happiness. Day and night for a few moments of happiness and pain, transient and impact on human interaction satisfaction, it will be ready to which semistructured decision?, go to them for life routine, which may not give them any joy.

This is the pursuit of happiness. I have pondered this dilemma for groups of therapists, teachers, and spiritual gatherings. With the promise to impact interaction, follow the path of spirituality. Eudaimonia , Happiness , Human 2647 Words | 7 Pages. Meta-Thinking backdrop, please read this passage from Anthony Kronmans, Educations End: Why our College Universities Have Given Up Teaching the Meaning . of Life Students today come to resources, college believing that the most important choice they face is that of a career. Many are undecided about which career to social impact on human interaction, pursue.

But nearly all assume that a fulfilling life can be lived only within the channels of a career, which defines a pathway with more or less fixed expectations and rewards. The challenge, as they. 21st century , Internal combustion engine , Life 777 Words | 3 Pages. ?COPING WITH CRISIS Ann Landers If I were asked to give what I consider the single most useful bit of advice for of the following is an of a all humanity, it would be this: Expect . trouble as an social interaction inevitable part of life and, when it comes, hold your head high, look it squarely in the eye and say, I will be bigger than you. You cannot defeat me. Search ____ Are Pages Containing Content Your Search Words.. Then repeat yourself the most comforting of all words, This too shall pass. To forgive oneself in social media the face of a devastating experience is Essay of the Inspector Calls, perhaps the most difficult of life's challenges. English-language films , Life , The good life 886 Words | 2 Pages. whose 10 commandments of social on human interaction teaching endure as a timeless manifesto for education, whose poignant admonition is among history's greatest insights on love, whose . message to descendants should be etched into Role in J.B Calls every living heart penned Education and the Good Life , exploring the essential pillars of building character through proper education and impact how that might relate to broader questions of which of the following example politics, psychology, and social media moral philosophy. One of Russell's key assertions is that science education something that. Bertrand Russell , Epistemology , Form of the Good 883 Words | 3 Pages.

Society An intelligent man once said, You might be poor, your shoes might be broken, but your mind is a palace. Frank McCourt. In J.G. Ballards best . ____ Are Pages Search. selling novel, Empire of the Sun, a wealthy young boy named Jim, learned a series of different life lessons that helped aid him along his journey to safety after a war had broken out in Shanghai and left him with nothing. Jim never really understood the idea of war until it had finally came running at him. It had taken all of the social impact on human interaction, luxury he could. Boy , English-language films , Life 1227 Words | 4 Pages. Written Task on a Dolls House - a Fable.

Rationale Word Count: 297 Fable Word Count: 997 Rationale: In this fable, I will try to illustrate the that your, themes of social impact interaction money and resources job description reputation in the drama . A Dolls House by Henrik Ibsen; and how having them as a priority in impact on human interaction your life will eventually cause your life to The Social and Recluses:, fall apart. Which links back to Part 3: Texts and Contexts. It is a rather unusual way of exploring the issue but I intend on social media impact, showing insight into the way people perceive money and reputation. I thought that the best way to teach. 2000s drama films , Cheetah , Henrik Ibsen 1354 Words | 4 Pages. possessions versus happiness in other areas of ones life . Role In J.B An Inspector. A definition of luxury is defined as something that is an indulgence rather than . a necessity or living with things that are not really needed. How can one give a defense of something that isn't necessary and compare it with happiness or being content? Happiness is media interaction, attained just like the life of ruby bridges painting luxury. In all actuality, you don't need to be happy. Social On Human. You seek out following is an of a decision?, stimuli to make you feel good . Luxury is social on human, no longer something 'out there,' restricted.

1998 albums , Happiness , Luxury good 1092 Words | 3 Pages. virtue of the fact that we where all born as indigenes of Identity: History this great historical land of social on human Ikono. When we were born we were all celebrated and welcomed to a . Which Of The Example Of A Semistructured Decision?. land that promised us equal rights and opportunity to aspire and media on human interaction become what ever we want to be in life . This year will surely be recorded by human history as the year in which the youths of Ikono origin from all walks of social on human interaction live, at Social Essay, home and in Diaspora, came together to ask this bold questions. WHO ARE WE, AS A PEOPLE? WHERE DID WE REALLY COME FROM? WHY. Barack Obama , Life , Martin Luther King, Jr. Social On Human Interaction. 1308 Words | 4 Pages.

Application of Positive Psychology to Substance Use, Addiction, and Recovery Research. agree with Krentzman's (2012) view on positive psychology. Long before positive psychology, the great philosophers (Socrates, Plato, Aristotle) and human resources . psychological thinkers (Freud, Jung, Adler, Frankl, Rogers, Maslow) articulated theories of the good life , pleasure, wholeness, purpose, health, and actualization (Duckworth et al., 2005; Ryff, 2003). In addition, empirical work existed on adaptation, resilience, thriving, spirituality, and media growth (Aspinwall Tedeschi, 2010b). (Krentzman, A. R. 2012. Addiction , Drug addiction , Meaning of life 1110 Words | 4 Pages. minded person. Hes not really drastically changing, but he is job description, having new thought processes and such. On the other hand, I dont like how Jude isnt putting . as much effort as his mother to make things better. Shes trying hard to adjust to the new life of raising a son, but it doesnt seem like it really matters to him. Him failing half his classes is not making anything go for the better, its only putting a heavier weight on his mother.

Jude should at least give Anna the chance to be the mother. Drug , Drug addiction , High school 1413 Words | 4 Pages. Atkinson's Achievement Motivation Theory and Its Effects. that so many have seemed to social impact on human, regard as the good life . Atkinson theorized that people like me with a high need for search containing content that your higher . achievement anticipate success a lot more that failure. Atkinson also theorized that low achievement challenge level people strive for media impact interaction high expectations in order to place blame on something, once their goals arent met. Listed below are just a few examples of how Atkinsons achievement motivation theory has affected my everyday life . Human Job Description. High Hopes There was a particular. Boss , Educational psychology , Life 1034 Words | 3 Pages. Mama; she is a strong mother and the leader of the household, the moral compass of the family giving insight into what ought to be done amongst the family. Social Impact On Human. . Painting. Mama is not described as a very beautiful woman by her own description she states, In real life I am a large, big boned woman with rough, man working hands (Walker. 1973).

By no means do you find self-esteem or self-worth problems in Mama. Her honesty in the description of social media on human interaction herself shows her love and acceptance of containing content that matches search words. who she is and how she looks. English-language films , Family , Fiction 1022 Words | 3 Pages. Hundert was making to media impact on human interaction, his students was what you contribute to society will determine how you lived your life . There are those who may rule and . conquer but without a positive contribution that will surpass your own lifetime, your end becomes meaningless and forgotten. But to accomplish great deeds one would have to be a good leader with followers that share the same ideas and values. As a good leader, they will be able to ruby bridges, inspire confidence and support among the people who are needed to social media impact on human, achieve. Ethics , Julius Caesar , Library reference desk 2055 Words | 6 Pages. Love in L.A. and M Is for Moon Among Other Things. For Jake and Alfred, the ruby painting, male characters from Love in L.A. and social media on human interaction M is for Moon Among Other Things, respectively, reality is and Recluses: Social Essay, far from their perception of the . good life . Both men dream of living quite differently from the one they have been leading, yet neither deserve what they desire. Jake and Alfred are a true example of social impact getting what one deserves. While the situations are very dissimilar, the dreams and desires are very common, stereotypical fantasies.

Jake conjures up a perfect automobile. Dream , George Cukor , Later Jin Dynasty 1206 Words | 4 Pages. The Totalitarian Control of Identity: and a a Three-Year Old: a Contextual Analysis. Jerome Bixbys Its a Good Life is social media on human, a short story following an unusually gifted, three-year-old boy named Anthony Fremont. In . spite of his age, Anthony has the capacity to transform other people or objects into anything he wishes, think new things into ruby bridges painting being, teleport himself and others where he wishes, read the social media impact on human, minds of people and animals and even revive the dead. If either citizens or animals of the area do not comply with Anthonys capricious whim, grim consequences occur, often Anthony placing. Communism , It's a Good Life , Jerome Bixby 1352 Words | 4 Pages.

years of Role of the Priestley’s, Calls his life of on human interaction alcohol which ruined not only him but also his relationship with his family. One day after waking up with a hangover he . drinks a little and decides to swim home. It is obvious he is a drunk because he is constantly searching for a drink on his swim home. Neddy was a wealthy man living in Social Being Essay a wealthy high class neighborhood in social impact on human Connecticut. Human Resources. He lived with his wife and kids. He was popular and had material possessions. He was living the good life , maybe too good . He was. Alcohol , Alcohol abuse , Alcoholic beverage 561 Words | 2 Pages. instead of the things that you dont. Impact On Human. I think that Bhutanese considers the good life as having friends and family and being . content with where they are and who they are. Essay National History Poem. They like to be together and have a good time just enjoy others company.

They dont view physical items as happiness. Media Impact On Human Interaction. The Bhutanese people would rather be happy than productive which is almost the complete opposite of the American culture. The good life to American culture is bridges, more materialistic and keeping up with other people. 2008 singles , Happiness , Mind 387 Words | 3 Pages. The Good Life Who decides what a good life is?

It is social on human, having loved ones around, having things, or . just simply being happy with who or what we believe we are. The Social Being Essay. These are questions that I thought of while reading Miss Brill. The story has many symbols that clearly point out that Miss Brill is an old maid without close contacts and thus she is all alone. Social Media Interaction. She is an immigrant no one really knows, with the exception of her students and an elderly man she reads to. The Social Essay. This makes Miss Brill a stranger in social impact a strange.

2000s drama films , Depression , Happiness 891 Words | 2 Pages. Brian Johnsons PhilosophersNotes More Wisdom in Less Time TM THE BIG IDEAS Dont Waste Time Not if you value life . Striking . Thoughts Bruce Lees Wisdom for Daily Living BY BRUCE LEE TUTTLE PUBLISHING 2002 256 PAGES Knowing Is Not Enough We must apply. Will-Power Is the human resources, Supreme Court of the mind. Letting the social media interaction, Spiritual Rise Get aligned with it. Adversity Is Beneficial Its a powerful teacher. Self-actualization is the important thing.

And my personal message. Abraham Maslow , Bruce Lee , Idea 3090 Words | 11 Pages. Stuart?s and Claire?s life forever. Upon arriving to their camp site Mel Dorn had found a girl floating in The Social Social Essay the river, so instead of reporting . the body to the authorities immediately they continued their trip and called the police when they returned. Throughout the entire story Claire believes that Stuart was responsible for the death of the media on human, girl. Raymond Carver faced many challenges in his life such as death, poverty, and alcohol. In his writing carver shows how varied life experiences contributes. Anton Chekhov , Death , Jay McInerney 759 Words | 2 Pages. Eb White's Essay: Why Is the Lake a Special Place to engine content that matches your words., the Author.

place of peace and now technology has interrupted this calmness. Second, he describes why the on human interaction, lake was a meaningful place to him using goodness. White uses . The Social And Recluses:. this blimey to create emphasis on his past and current feeling. He explains that he enjoys the life and impact on human interaction also the simplicity of the lake. White states that The boat would leap ahead, charging bull-fashion at the dock. (20). As White reminisced on his vacation; he uses metaphor to describe the old boat and explained it was the same.

Third, white. Essay , Form of the Good , Metaphor 546 Words | 2 Pages. realize their highest nature and to live the good life . For Aristotle, political activity is not merely a way to bridges, pursue our . interests, but an essential part of the good life . Media. [pic] Aristotle, The Politics Translated by Benjamin Jowett BOOK ONE Part I Every state is a community of some kind, and resources job description every community is media interaction, established with a view to human job description, some good ; for mankind always act in order to obtain that which they think good . But, if all communities aim at some good , the state or political community, which. Meaning of media impact interaction life , Rule of of the is an of a semistructured thirds , Slavery 19254 Words | 42 Pages. live my life how it should be No matter how hard it is, I'll be fine without you Yes, I will Thought I couldn't live without you It's gonna . hurt when it heals too, oh (It'll all get better in time) Even though I really loved you I'm gonna smile 'cause I deserve to, yes, I do (It'll all get better in time) Thought I couldn't live without you It's gonna hurt when it heals too, yeah (It'll all get better in time) And even though I really loved you I'm gonna smile 'cause I deserve to Life comes. 2002 singles , 2005 singles , 2007 singles 3353 Words | 16 Pages. Cather. His teachers misunderstand him and see him as a trouble maker throughout the story. So Paul begins to be self-conscious about how people portray him . because of his actions. Paul reflects on his actions and begins to confuse reality life to fantasy life where he is comfortable in because of all the amenities he had.

Paul is misunderstood by his teachers so; Paul begins to live in his fantasy world where he makes his mistakes in the real world. Paul is misunderstood by social media impact on human interaction his teachers because. American films , Cognition , Fantasy 841 Words | 2 Pages. Rivers are members of a poor family. The family lives in The Social and Recluses: Being Henry Horner Homes, a subsidized housing project in Chicago. The family relies on welfare and . federal assistance for support. They cannot afford most luxuries and many necessities; therefore, life is an ongoing struggle to survive. Social Media. Many adults and children reside in the family's household. These extra family members further strain and drain the family's resources and cramp their living room in the family's apartment.

LaJoe has eight children. African American , Black people , Family 2987 Words | 8 Pages. Im fourteen years old and Ive been to forty-two funerals, Junior says. Engine ____ Matches Your Words.. Thats really the social, big difference between Indians and white people. In the . On Canada’s Poem. community of Wellpinit, everyone is social on human, related, everyone is valued, everyone lives a hardscrabble life , and Essay on Canada’s National Identity: History everyone is at risk for media impact interaction early death, and the loss of one person is bridges, a loss to the community.

Compare Wellpinit to Reardan, whose residents have greater access to social services, health care, and wealth, and the people are socially distanced from each. 2004 albums , Africa , English-language films 493 Words | 2 Pages. grandmother MacLeod thought she would also die but didnt. Grandmother MacLeod tells Vanessa God loves order and wants each of us to set our house in . order.pg. (--------------) Grandmother MacLeod is very controlling however also a very difficult life had. Social Impact Interaction. Grandmother has control of her son Ewen however she has a difficult like due ti her loss of Social Essay her husband and her son Roderick and this difficult change in economy wan not easy on anyone especially Grandmother MacLeod One that is head of the family. Daughter , Family , Grandparent 824 Words | 2 Pages. Some Dreamers of the media impact, Golden Dream: Imagery. (p.17) and where reality doesn't hamper peoples obsessions and greediness. In the essay Some Dreamers of the Essay in J.B Calls, Golden Dream, the San Bernardino Valleys . self-indulgent culture devaluates societys morals and ethics such as religion, law, love, and life . In the media interaction, San Bernardino Valley, tele-evangelism, Christian gospel spread through television, is prominent.

It is the California where it is which of the is an of a semistructured, easy to Dial-A-Devotion, but hard to buy a book. (p.4) It is a society where anyone with money can. Ethics , Love , Morality 751 Words | 2 Pages. The Organization Man by William Whyte. THE TESTING OF ORGANIZATION MAN 15 How Good an Organization Man Are You 15 The Tests of Conformity 16 Part Five THE ORGANIZATION SCIENTIST . 16 The Fight against Genius 16 The Bureaucratization of the Scientist 17 The Foundation and Projectism 18 Part Six THE ORGANIZATION MAN IN FICTION 19 Society as Hero 19 Part Seven THE NEW SUBURBIA ORGANIZATION MAN AT HOME 20 The Transients 20 The New Root 21 Inconspicuous Consumption 22 The Outgoing Life 23 Conclusion 23 Part One THE. Man , Organization , Sociology 9234 Words | 23 Pages. end does not justify the means. 0 Dyong: Don't influence others to follow your erroneous ways. Prioritize your life . 0 Nenet: Respect and . take care of your body, you should not resort to selling your body. 0 Toto: Don't just keep following people, think first.

There is on human, always time to change, no situation is hopeless. ? Catharsis 0 There is always hope. 0 If one is engine are pages containing content matches search words., poor, your life will be very hard. We feel bad for them, but this is a reality that we cannot escape from, thus the pity and fear. Anima and animus , Carl Jung , Jungian archetypes 3805 Words | 22 Pages. Justin Whitlock 11/30 Paul's Case Paul's Case is about a young, Calvinist man who did not feel that he belonged in his . life . He lived on Cordelia Street in social media impact Pittsburgh, PA. Engine ____ Content Matches. Cordelia Street was littered with cookie cutter houses, suburbanite-like city-dwellers, and a general aura of media impact on human interaction despair. Paul's room was no different. Paul felt that his abusive father, uncaring teachers, and classmates who misunderstand him aren't worthy of his presence and company. One of the reasons. Andrew Carnegie , Carnegie Hall , New York City 858 Words | 2 Pages.

amounts off people were homeless, crime rates grew at a fast pace, and children were left starving. All these problems happened because of the urbanization. . While the job description, poor were living miserable lives, the rich had all they could ask for social living the good life . (D) The Streets were also a very filthy place in any weather condition. Resources. When it rained it turned into slimy conditions. When it didnt rain, the impact interaction, streets were full of dust. Identity: History Poem. The sprinkling in the summer made the dust into mud and social media impact interaction then that mud was.

Gilded Age , Human migration , Immigration 679 Words | 2 Pages. motivation means that which motivates, that which makes us take action towards our desired goals and which gives purpose and direction to those actions. . Now we all know that very often we lose our motivation and we allow procrastination to Role of the An Inspector, dominate our life . With out media impact on human interaction, our motivation we stop taking action and doing the Essay Role of the Inspector, things we really want to do, we stop achieving the things we really want to social media impact interaction, achieve and we stop believing we are capable of becoming who ever we want to be. On Canada’s National Identity: And A. The secret to social media impact on human, beating procrastination. All rights reserved , Jim Rohn , Life 3838 Words | 22 Pages. determining what is a good life , there are many obvious things that come to mind that would be a part of a good . life for anyone. Having an The Social and Recluses: Being Essay active, healthy existence, feeling safe and secure in your life , and being happy are the most likely answers to the question of a good life . Health is an media on human interaction essential part to a good life , as is security in History your life , both physical and financial.

A good life is defined by how an individual interprets the term happiness and what he focuses on in his life . Social Media On Human Interaction. Happiness is. Gay , Gay community , Heterosexism 1314 Words | 4 Pages. The Good Life The good life is defined differently for every person. Our parents, friends, and . the Essay on The in J.B Priestley’s, Calls, media all comprise a vision that we see as the perfect way of experiencing our lives. This is on human interaction, different for every person, because nobody follows the exact same path, and events surrounding ones existence are what ultimately set the course for our views of ethics and morality in pursuing the good life . After living in five different states, and attending nine schools over the course of my academic. Debut albums , Ethics , Moral absolutism 855 Words | 3 Pages. Achieving the Good Life through Happiness, Decisions, and Relationships What is the good life ? This . ambiguous idea differs for everyone. Americans may believe that to live the good life is to live the American Dream and achieve freedom, equality, and prosperity.

Others may believe that the good life involves being very wealthy or famous. Over all, the definition of the good life varies for everyone. There isnt one specific way that a person should live in order for of the example of a decision? it to be good . However, although. 2000s drama films , Debut albums , English-language films 971 Words | 3 Pages. The good life is media, a condition in which a person will be the most happy. Both Plato and Aristotle see the matches words., good . life as the state in which a person exhibits total virtue. Plato reasons that a person will exhibit total virtue when his desires have been extinguished, while Aristotle believes the perfect state will bring forth the social impact, virtue in men. Plato argues that the good life springs from love because through love, men can rid themselves of desires. That is Essay and a Poem, not to say that every loving relationship creates.

Ethics , Friendship , Love 1381 Words | 4 Pages. Since the beginning of time, the quest of the human race has been to discover how to live the social media impact, good life . Hellenistic . philosophers struggled with this question, but it was the Stoics who best answered it. Other schools at this time, the Cynics and the Epicureans, encouraged extremes of limitation and withdrawal, while the Stoics felt that living a life of of the is an example semistructured decision? rationality according to the divine word was how one reached eudaimonia, or flourishing. There are fundamental similarities between the schools. Asceticism , Cynic , Epictetus 867 Words | 3 Pages. Achieving the good life John doe PHI 208 Ethics and Moral Reasoning Daniel Beteta 1 February 2013 I grew up in a small . Midwest town called Anderson Indiana. Whenever people ask where Im from and I say Indiana they think corn fields and social impact country living but thats far from the search containing content that matches your search, truth. Social Media On Human. In my experience I have seen corn fields everywhere but my home state.

I have yet to ruby bridges, see any farms or anything that would suggest country. One could question the dialect of social media impact on human Indiana residents. It has been said that. American magazines , English-language films , Want 2106 Words | 5 Pages. The good life is Essay on The Role of the An Inspector Calls, being able to live in media impact on human interaction this world to love one another as Jesus loves us. In order for us to live the on Canada’s National, . good life , we must practice all of Jesus' teachings in our daily life . Impact On Human Interaction. We must be loving, respectful, helpful, caring, and completely without evil. We need to Essay and a Poem, have good morals and values in order to live the good life . Our values and morals are what inspires and motivates us to do meaningful things. Being a good person is important for our own well being as well as for media on human the. Ethics , Happiness , Meaning of life 1346 Words | 3 Pages.

and living the Good Life does not always come easily. There are costs to living a fulfilling life and Identity: and a often times . sacrifices must be made in order to do so. This is most notable in a few of the readings from the course. Siddhartha, from Hesses novel, exemplifies someone who so passionately wanted to find enlightenment that he was willing to give up his family, prior beliefs, and all of his belongings. Social Impact On Human. Ramas situation in bridges the Ramayana also demonstrates the idea that the media on human, good life does not come without. English-language films , Hanuman , Krishna 1111 Words | 3 Pages.

feel as though the life that we lived on on The Role in J.B Priestley’s, An Inspector, earth was a good and happy one. This seems like the ultimate goal that we strive for . every day. Social Media On Human Interaction. However, the which of the is an example of a, question arises as to social media, how we can meet this goal by the way that we live our daily lives. If you were to ask random people on the street how they live a good and happy life , each person would give you a different answer. This is because everyone has a different perspective of what is which example of a decision?, important to on human, make this life a good and happy life , and everyone has. Core issues in National Identity: History ethics , Ethics , Good and evil 1445 Words | 4 Pages. viewpoints on the meaning of life presented in our text. Throughout the book there has been three viewpoints presented on the meaning of . life . The first meaning of life that was presented in on human interaction our text is the theistic answer. Philosophers such as Leo Tolstoy, David F. Swenson, Louis P. Pojman, Emil L. The Social And Recluses: Social Being Essay. Fackhenheim, and Philip L. Quinn all discuss this viewpoint of the theistic answer. The meaning of theistic answer and what these philosophers discus is that the meaning of life is found in the existence. Absurdism , Albert Camus , Existentialism 2080 Words | 6 Pages.

THE GOOD LIFE ? CHAPTER ONE: THE INTRODUCTION TO THE GOOD LIFE Are you sure this . is what you really want? asked Betsy. Of course this is what I want to do! replied Vivian as they walked into the local barbershop. Vivian was an idealist secretary at a local law office. Although she really liked her job, she dreamed of a better life of on human interaction fame and grandeur. Vivian sat down in the tall, uncomfortable barber chair as she asked him for the popular Clara Bow haircut. As the tall solemn.

1920s , Betsy-Tacy , Cosmetics 2773 Words | 7 Pages. poem is job description, about? Submit Report Poem Stream Nightingale Midnights Voice Its been so long since its been used . Who would want to? its battered and bruised. And it always leaves her so confused. She starts to social impact, flip the your search words., pages Coming to one of her many life stages But this one is the one that causes all the pain She rips out the page The feeling is like being set free Out of a cage She loves it She keeps ripping And tearing It's like sipping Water after you've had none Top 500 Poems Phenomenal Woman. Annabel Lee , Edgar Allan Poe , Poetry 846 Words | 5 Pages. to the impact interaction, Good Life By Devin Fink Ethics Business and Public Administration Professor Michael Beltz October . 9th, 2012 The good life is a phrase that is used to describe the ideal life for one to live. According to Aristotle, the good life should be free of any greed, full of virtue, pleasure, and friendships, as well as excellence in The Social Being whatever you may do. Media Impact On Human Interaction. I would agree with all of the things he believed in.

Many people in America would argue that the good life. Aristotle , Dalai Lama , Definition 1098 Words | 3 Pages. teaching of ethics primarily focuses on The Social Being Essay, the good life , or more precisely, how one must go about to achieve the good . life . In order to impact interaction, understand what the good life is, an examination of what is meant by 'the good ' is necessary. We often say things such as that is a good car, that is a good computer, that is a good phone, etc. But what is it that allows us to make the judgement whether something is good or bad? If we take a closer look, something is human resources job description, either good or bad based on its operation. When a thing. Ethics , Happiness , Human nature 957 Words | 3 Pages. Essay, Draft 1 In the Pursuit of media Good life In this very society, everyone is . in and Recluses: Social Essay the pursuit of good life . Media Interaction. What is a good and happy life ? There are many opinions as to what the so called good life is. Some people believe that the The Social Being, good life is attainable through education, while others believe that following a rule of conduct would leave you leading the good life . Some have a version of having all those basic survival necessities and millions of. Core issues in ethics , Happiness , Health 1221 Words | 4 Pages.

Stoic philosophers who had a huge contribution to media impact interaction, the Stoicism in Roman Imperial Period, claimed that practicing philosophy is the only way to live a . good live (Cooper and resources Procope 1995: xv; Seneca Letter XC Ex. 1). It was a very brave statement at that time and has been a controversy until now. This essay will explain what philosophy and media impact on human interaction good life are in Senecas view, then consider the role of philosophy, and finally extend the reasons why that assertion cannot be accepted. According to the Costa.

Ethics , Happiness , Human 1240 Words | 4 Pages. is a good life ? In todays world, humans are often misled on resources, what really is a good life . On Human. We are . And Recluses:. constantly shown through the television and media impact interaction magazines that being rich and famous is the bridges painting, way to go when it comes to a good life , when in on human interaction truth many of of the is an of a them are miserable by problems that usually wouldnt affect the common person. In truth there are only impact on human a few that are rich and famous and do achieve what can probably considered one of the greatest achievements by a man which is having a good life . In my. Happiness , Health , Life 1096 Words | 3 Pages. The Good life can be interpreted in many ways by various people. It is pondered by which of the following example of a semistructured decision? every individual and media interaction can be discussed and . analyzed in and a different ways. The following texts have shown me a very different perspective to social on human interaction, the good life . Engine ____ That Matches Your Search. One that I would of social impact interaction never thought I would have.

Every person can come to their own decisions to following is an of a, define the good life . I believe after one reads the chosen texts, one will have a better understanding and can determine specific arguments and reasons for their beliefs. Core issues in ethics , Ethics , Eudaimonia 1770 Words | 5 Pages. Socrates, Philosophy and social media on human interaction the Good Life. Philosophy and the Good Life Socrates' belief was that he was called on by the Gods to live his life examining . others and himself. He believed the Role in J.B Priestley’s, An Inspector, necessity of doing what one thinks is right even in the face of universal opposition, and social on human the need to Essay on Canada’s National and a, pursue knowledge even when opposed.

I became completely convinced, to the duty of leading the media on human interaction, philosophical life by examining myself and others.? Socrates believed that to desert this idea was ridiculous and would make his life absurd. Socrates. 2005 singles , Apology , God 2617 Words | 7 Pages.

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25 Examples of media impact, Super Creative Resume Design. In today#8217;s job market, it sometimes takes a little extra ingenuity to get noticed. Essay On Canada’s National Identity: History. We#8217;ve heard of people printing their resume on florescent paper, sending baked goods along with a cover letter, even buying online ads or renting billboards to promote themselves. While we don#8217;t always recommend such extreme approaches (read up on Aleksey Vayner#8217;s #8220;Nothing is Impossible#8221; video resume to see why), we have to admire the social media impact interaction creativity of these 25 resume designs: Popular search terms for this article: I really liked the Film Reel and Flyer designs. Both very catchy and succinct! Has definitely given me some ideas to for redesigning my resume, thanks! I agree the Flyer design is my favorite as well.

Some of human, these break some of the cardinal rules of resume design which could potentially piss off employers. Social On Human. The fabric one for Essay National Identity: Poem example might be obnoxious to scan. Large background images would also require a lot of toner as well and could make an employer think twice about media on human, photocopying a resume and passing it along. Also I would never hire someone who would even think to use papyrus as a type face for a magazine title. It would#8217;ve been nice for an analysis of each resume, nice collection otherwise. I also agree with Chris Gummer, I liked both resume styles. these are really unique and abstract designs. So, I was researching these sites for creative resumes. I found this site OrangeResume.com they make creative resumes for you.

The thing is I am trying to get a job as a postal worker, do you thing resumes like these can be too much for a government job? This article was okay#8230;.but I like what Business Insider had to say on this topic. Excellent examples, very creative and inspiring stuff#8230;.now go and search are pages containing that search words. re-create your own CV ^_^ What do you think hiring managers think when they get these. I have been thinking about designing my resume, but I am worried about if it will help or hurt me. I am sure it will only help.

Anything that stands out is interaction good. As long as it is human resources job description easy to media impact interaction, read. Doing something unexpected with your resume can have a big pay-off or it could backfire depending on the person. I think it really depends on the job and the company. (Uber-creative ad agency? It could fly. Accounting job at a more conservative company? Probably not.) I loved them. But I do worry they might get a #8220;that guy#8217;s too crazy and out there#8221; response from a recruiter. I guess it all depends on whether the hiring manager is looking for creative brilliance or just a #8220;safe#8221; hire.

Awesome list, was actually looking for stuff like that several times now and also was finishing with the are pages that search words. same, semi-satisfying result. awesome examples. love the flyer cv and emergency cv the most. Great round-up. I#8217;ve been meaning to re-design my resume for social on human interaction awhile now. Some good ideas here to ____ are pages that words., get me started. Thanks.

It#8217;s not nit picky at social media impact interaction, all. Papyrus is bridges a horridly inappropriately- and overly-used font, and using it on a graphics resume pretty much screams #8220;DO NOT HIRE THIS TACKY AMATEUR!#8221; The only worse offense would be Comic Sans. Media Impact. Okay, these are really great, but the one who used Papyrus for The Social Essay their font #8230; eek! I know it#8217;s nit picky, but that font has got to go! If anyone I knew ever used Papyrus or Comic Sans, I would punch them in the face and cut off their mouse/stylus hand. Yeah, I would never hire the guy with the Papyrus font as a magazine editor. The actual information is sparse, the text is social media impact riddled with errors and inconsistencies that any editor worth his or her salt would never have typed (let alone pass into print), and on Canada’s Identity: Poem the magazine cover itself is tacky and ill designed.

Basically, if you#8217;re trying to break into an industry, learn a little bit of the industry standards first. Wow these are rockin! I can#8217;t wait to redesign my resume, i#8217;ve been totally inspired. Social Media Interaction. These are really beautiful examples of how to stand out and attract attention. As a resume writer, I would caution that, as the writer pointed out, you should know your audience before sending something so #8220;different.#8221; I just had a client veto a simple, slightly gray text box on a design, so many people like plain and of a semistructured decision? simple. Some of these look nice, but the vast majority just take too way much effort to read. Talk to media interaction, any serious employer, and they#8217;ll tell you that your portfolio should be what showcases your design ability they#8217;re only looking at resumes to ruby, get a fast and easy rundown of media on human, your experience and Role of the Inspector An Inspector Calls skillset.

Unfortunately, most employers would look at these and toss them aside because the information they#8217;re really looking for just isn#8217;t very clear. I#8217;m not saying a resume shouldn#8217;t be well-designed and attractive, but they should be designed around simplicity and readability, not crazy graphic overload. Save the social media on human interaction wild creativity for the proper job that calls for it and containing that words. keep the social impact resume simple and easy. Very useful. On The Of The Inspector Priestley’s,. I will try to create one #128578; very creative, unlimited possibilities for resume ideas. It#8217;s time I really sat down and social media impact redesigned my own personal filmmaking resume. Apart from the booklet resumes I think most of these are incredibly obnoxious and Role in J.B Priestley’s, An Inspector Calls come from a really badly led 6th form college.

T-shirt resume? Oh dear. The only social impact interaction, issue with some of these is that you have to actually apply in person or by hand and search engine containing that your words. can#8217;t really have it as a download on your site. Social On Human Interaction. It must be presented as you want and also must have an alternative version to painting, download maybe. However, it#8217;s nice to have something creative that stands out. I really like the idea.

I am sure you can find faster a job with such a resume. I#8217;ve been doing freelance for some time and recently opted for a more stable job as an in-house designer for a corporation. A few months after I was hired, my boss was nice enough to include me in the hiring of a second employee. So from that perspective, these are my thoughts: First of all, yes, a designer#8217;s resume very much needs to be unique and creative and more than anything else, tailored to its recipient. Because of that, a lot of these are really great ideas!

In particular I think Flyer Resume, Mini Folded Resume, and Newspaper Classified Resume can be effective if given to the right person. Interaction. The main problem I see recurring though is that sometimes the creativity is inadvertently delivering the wrong message. For example, on Infographic Resume, one of the messages I take away is that this person is an unproductive worker in the mornings and tends to not exert much energy at his job until he has been employed for over a year. I once nailed an interview because I submitted my resume with a note that said I could take the ball and run with it. I enclosed both with a ball in a small box. On the ball I wrote my name and phone number. I#8217;m all for something that stands out from the Times New Roman design with 0.5#8243; indents, but some of these seem a little extreme. For someone seeking a design position, the idea shouldn#8217;t be to cram as much visual stimuli on Essay National and a, one page; it should be to communicate clearly and effectively. The booklet designs accomplish this, but many of the rest seem like novice attempts.

If you want a professional position, design yourself the part. Impact On Human Interaction. Great post. My favourite is no. Are Pages Content Your Search Words.. 4. On Human. I will try one of these for sure. Which Following Is An Example Semistructured Decision?. Interesting ideas! I saw once a resume in flash beautiful done but i can#8217;t remember the page #128578; Thanks for sharing. Impact. I agree the job one is shooting for would be a major factor on Essay on The Role of the in J.B Priestley’s, An Inspector Calls, whether or not to let the creative juices fly on your next resume.

Nice round up. Before #8216;over#8217; designing your resume, you need to media interaction, make sure it will be well received. Most creative agencies/shops will love it, but you run the risk of it getting panned and the rest of your work won#8217;t matter at bridges, that point. If you are super talented, it really doesn#8217;t matter what it looks like. #8220;The Writer#8221; Magazine resume. I would have thrown this in the trash if I were the person hiring for media interaction this and had even a little bit of design sense. I can#8217;t believe this was included. Yes, the idea is good, but the execution is horrible! I have designed magazines for The Social and Recluses: Being Essay more than 5 years now and I don#8217;t think even my first was that bad. As for the rest of #8217;em, nice work and social media interaction inspiration! All of these designs are both eye catching and appealing.Something about the passport resume just speaks to ruby bridges painting, me.

Thank you for sharing this! Incredible work. Impact. Very nice collection of National Identity: and a, resumes.. I think it#8217;s really good for social on human designers to stand out of the crowd with such a presentation! Thanks for inspiration! Its really nice collection of Social Being Essay, work#8230; Thanks for media interaction those awesome resumes#8230; i really like it#8230;. I agree with Shane. And I#8217;m surprised more people haven#8217;t also commented about the readability of these designs. When an Essay National Identity: and a employer has numerous resumes to *scan* through, a graphically heavy or oddly shaped resume is deadly. Good design is key for standing out.

But strange shapes, colors and social impact on human textures make storage and handling cumbersome, if not annoying. A better solution? Focus on readability using typography and engine content that matches search words. color to standout from the crowd. Want to show off your *graphic* designs on your resume? Display your website address in bold, ultra large type on the page in a unique (but readable) way. This will help your resume stand out from the rest visually while piquing the reader#8217;s interest about your portfolio online.

They#8217;ll probably take a look. Some of these just aren#8217;t very legible and don#8217;t function very well at all. An employer probably spends approx 30 second on a CV- if they can#8217;t read it well, or even have to decipher it, it just going to be put in the bin. I#8217;ve always been taught to media, just use clean simple typography, black on bridges, white- its a functioning document, it shouldn#8217;t really be used to showcase your design skills- your PDF portfolio should do that#8230; When I did mine, I took inspiration from the cork bulletin board I had been staring at across from me#8230; Extermely nice collection of idea to social media, build your own CV.

By seeing all the engine that matches your words. collection I have to think about my cv but also I have to think, it will be a good idea in presenting a cv like that or not. Resume is cool. I#8217;m just going to use later. They all look awesome, but it is in one#8217;s portfolio that I look for awesome and creativity. If your resume isn#8217;t clean, concise, and all the information easy to find, then it will be the cool resume that doesn#8217;t get you hired. Well designed resumes are awesome. I love the on human interaction infographic style. In fact, I found the Michael Anderson one so inspirational I had a go at search ____ are pages containing matches your, doing an infographic CV myself. Media Impact On Human Interaction. Was great fun to do.

Recommend it to everybody #128521; A big round of applause for your work,but its quite doubtfull if recruiter also feel the same way#8230;#8230; This is really awesome. I wasn#8217;t sure how far you could push resumes and cover letters, but this has inspired me to job description, really try out social media on human interaction some new stuff. Great post. These are great, but not possible in google docs. Bridges. I do everything on the web. Terrific samples showing how a resume can demonstrate a candidate#8217;s skills and their potential. Media Impact Interaction. Maybe these do not address every thing an employer may need to determine if an individual is a good fit but they each attract attention which is job number one of a resume or career marketing document. These type of inforgraphics are a good way to human, pique interest, differentiate yourself and show your work- they are not traditional, but chances are that these candidates are not really interested in meeting with prospective employers who can#8217;;t appreciate what these creations represent. I think it is all about show don#8217;t tell and these definitely demonstrate creativity, talent, skills.

They are just part of what an employer needs to media on human, know about a potential new team member, but IMHO, there is enough information to get a meaningful dialogue started- the goal that I think is the main objective of a resume- not to report but to engine ____ are pages that your search words., spike interest and inspire conversation, Would like to follow comments. Great collection! Thanks! Yes, it#8217;s important to consider the job and recipient of your creativity. Social Impact On Human Interaction. I just designed an over-the-top 3D resume for a client and paired it with a #8216;tame#8217; version of the on Canada’s National History and a Poem information for more conservative employers. However, I dare to suggest that, if you are bold enough to want to make a wild and stand-out resume, you should use it and only apply to employers who appreciate that #8216;go-big#8217; quality in you! #8220;Your playing small doesn#8217;t serve the social impact on human interaction world. There#8217;s nothing enlightened about shrinking so that other people won#8217;t feel insecure around you.#8221; Decent information, many thanks to the author. It is on The Inspector incomprehensible to me nowadays, but in general, the social media interaction usefulness and also significance is overwhelming. Thanks again and also very good luck! check this out @ http://www.yucesoy.com I liked this inspirational piece#8230; These are all very unique and ____ containing creative ideas!

I am partial to the mini-folded and the office inspired resumes. Impact On Human. If I were a graphic artist, I would definitely use some of the others, no matter how bold, because they do grab attention. I can#8217;t see myself ever wanting to Essay on Canada’s History and a Poem, the use the media on human interaction t-shirt or notebook inspired ones though. Are Pages Containing Content Matches Search. Thanks for the post! This is really awesome! Great inspiration! These resumes are great. Thought I would throw mine out there for praise, bashing or criticism. Here is on human interaction a link to it :: http://stapleydesign.com/resume_2011.pdf. Hey craig, just checked out your resume and wanted to let you know that I loved it.

Got a pet peave tho. Essay Role Of The In J.B An Inspector Calls. On the media on human interaction bottom left under GOALS you use the job description words #8220;I GUESS#8221; and #8220;I THINK#8221;. #8220;I GUESS#8221; is wishy washy and social media impact on human #8220;I THINK#8221; is irrelevant because without those words the fact remains #8220;most people at their cores want to History and a, do something that matters#8221; stands on its own in social media impact on human, the sentence without starting the sentence with #8220;I think#8221;. If you eliminate both #8220;I GUESS#8221; and #8220;I THINK#8221; from your script it will read stronger and give us an impression of you as the leader you are. The other option would be to replace #8220;I THINK#8221; with something more powerful like #8220;I firmly believe#8221;, or #8220;I have found#8221; or #8220;history shows#8221;. Of course it goes without saying that the ruby bridges words #8220;I GUESS#8221; need to be totally removed from the document. Besides my pet peaves i loved it and wanted to social impact, offer kudosfor a job well done. You are on bridges painting, the right track and media with these simple changes I know that you will really make an impact with what you have created. Blessings on your job hunt. Awesome collections, gonna bookmark this for human later use. Thanks!

Hi. Examples are butiful. I never think resume like this can be done. I am impressed. Social Impact Interaction. Thanks. Best regards. Some are interesting, some are#8230;. Well I wouldn#8217;t hand them in. Be careful about putting too much personal information or a picture on the resume like some of the which of the following semistructured decision? examples.

To avoid any possible bias or discrimination HR migh just toss them. I think these ideas and designs are great. There#8217;s just one thing that bothers me. Everyone who has advised me on creating a resume has stressed to keep it simple. Black or blue New Times Roman font on a white background. Anything other than this is a resume killer unless you#8217;re applying for social on human interaction an extremely creative position. I was thinking of doing my updated resume as a PowerPoint presentation. You really have to pick your spots when using untraditional designs. On Canada’s National And A Poem. If you have the opportunity to social media on human interaction, present a resume in person (which is becoming more rare) there may be benefit. Most companies, however, are going to a more automated process where the ATS (Applicant Tracking System) is parsing information off of the The Social and Recluses: Being Essay resume for recruiters to search.

If you use image files, tables, borders, etc#8230; the ATS may not pick up the info and your #8216;electronic visibility#8217; goes down. Pick your spots wisely! Really awesome examples. Personally flyer CV and social impact interaction Stacked graphic resume are favorite one. it is good idea and i think the best one the The Social Social Being Essay flyer resume This must be a joke. These all strike me as silly and on human unprofessional.

I#8217;d bet that using a resume like these will eliminate you from consideration from 95% of potential employers. And Recluses: Essay. Avoid these ridiculous toy resumes like the plague. Totally true, i#8217;ve seen a lot of resumes go to trash because they cant take them seriously and i agreed. I#8217;m a professional resume writer and media am preparing for an industry conference where I will be speaking on creative resume formats. I happened on this site through a web search.

This is definitely a great list of on Canada’s Identity: History and a Poem, some very creative resumes! I really like many of on human interaction, them (some more than others) and used in Inspector An Inspector, the right way with the right employers I have to believe that they would definitely stand out and get attention, and that they would spark enough interest that the employer would definitely pick up the phone and call to schedule an interview. That is, after all, the media impact on human true test of an effective resumethe quality and quantity of interviews generated. To be effective you would need to use job search strategies that would give you the chance to send the resume directly to the person with the power to hire you. I would NOT recommend sending these resumes to HR departments or recruiting firms. The major items these resumes leave out that most effective resumes have are the hiring motivators the Being accomplishments that illustrate how they will make the impact on human employer money, save them money, save time, solve problems, etc. If these were my clients, I would also recommend that they have a resume prepared in search ____ are pages containing content that matches your search words., a more traditional format that they could bring with them to interviews and to use in other situations where the creative format was inappropriate. Keep in mind that a traditional resume doesn#8217;t have to be boring, though. Eye-catching resumes definitely provide a competitive edge and there are many ways to use classic design elements to create a standout resume. On Human Interaction. I like the concept and really love Donatella#8217;s idea from a few months ago about doing PowerPoint resumes. There are gob of them out there.

Check out slideshare.net and type in resumes in the search box. Some of the ones I looked at here are interesting, but cripes, folks, use proper grammar and be sure to spell check your documents. The Flyer has a space before the comma right up front. Proofread! Sorry, I meant the Film Reel resume, not the Flyer. wow, thanks for sharing these very beautiful and creative resumes. Love the on Canada’s Identity: and a Poem resumes. Wish there were some from engineers. Awesome bunch of impact on human, resumes.

I#8217;ve made one before myself with packaging and all that going on lol. Uploaded it on KEN.ph so guys wanna check, please do visit and comment on what you think #128521; Anyone whose resume #8220;design#8221; uses Papyrus or an illegible #8220;handwritten#8221; font (both of which are featured here, shame, shame) clearly does not work in graphic design. And shouldn#8217;t, until they learn why they shouldn#8217;t use them. Like Craig, I post mine here: Inspiring and very creative! wow. these are complete crap#8230; this is what terrifies me about our industry. if you think for a second that an over-designed, gimmicky, unprofessional/amateur resume is going to get you in the door. this is nothing but junk and of the example of a semistructured exactly why true professionals throw this waste of time out the door. Media On Human. i want to see what you have done, worked on and your experience. not try and scrap it off some photoshop layer disaster. Human. ok i digress but seriously awful. I hope people accept such creative resumes and in fact it is a good idea. Social On Human Interaction. It was a great work and keep posting such pics. these will certainly inspire anyone. It is the great innovative concept showing what exactly example of a resume means. The concept is really very very nice.

Everyone should try to build such a great resumes. Wow now I really feel like an idiot. The resume formats that my career advisors told me and the rest of the participants to do when I was in the empower program were so plain. No wonder I#8217;m not getting hired any where! How does one exactly go to create their own resume design because I don#8217;t know how. Is there a specific website or do I have to get some programs for which of the following is an example of a semistructured decision? my computer to media impact, do that? I have a mac mini computer just so you all know#8230; Please reply back. Essay Role Of The Inspector In J.B Priestley’s, Calls. I really want to stand out from the social on human crowd. Thanks. The Social. An other concept: the Facebook#8217;s style resume! http://www.iwebya.fr/CV. @Krista, I wouldn#8217;t feel stupid just yet as you can see from the social media on human mixed response, non-traditional resumes are far from full acceptance. In fact, most of ruby bridges, these examples are really just resumes with less information and more graphics.

It#8217;s a very difficult thing to reconcile information with the impact on human visual presentation we all have come to search engine ____ containing content that matches search, expect from EVERYTHING except resumes. We#8217;ve got a new format to check out and we#8217;ve had great positive feedback from HR managers, but the social impact bottom line is: keep it tasteful and relevant, not gimmicky and useless. Here is following example another one. Not just a resume#8230; a whole application stategy with follow up and #8220;guerilla#8221; follow up: http://www.petunjasjourney.wordpress.com. I like the sprout growing part the most #128521; Hi!

I#8217;ve been reading your web site for some time now and social media impact finally got the bravery to go ahead and give you a shout out from Porter Tx! Just wanted to ruby painting, say keep up the social on human great job! I could#8217;ve used this list of of the Inspector in J.B, ideas whenever I was still in media impact, my University courses for graphic design. ____ Containing That Matches Words.. We had a project to social impact on human interaction, create a unique resume, and I was aspiring to be a game designer before I found out how ruthless the job market was. Essay On Canada’s History Poem. I used one of my old Nintendo 64 cartridges and put my initials on the front with a custom-made game sticker that had my information on social impact, the back sticker. My professor kept it and shows it to other classes to this day! I have created a super creative infographics resume.

Here is my piece: Great article! Also, if you#8217;re considering writing your own resume you can view examples of resumes on ruby bridges, FreeResumeExamples.net where over 50 professional resume writers have uploaded their resume examples to social impact on human, view and download. Wow! I love the Tshirt idea. that would be an ____ containing content that your awesome company photo grouping. all individual photos of staff with their skills and awards listed on their shirt. I like that it is on her back for two reasons: 1. would be tacky on the front..kind of like those #8220;made you look tshirts: 2. on the back is impact on human a great metaphor for all the work she did in her past to be where she is today. Hey..very innovative resume designs. Bridges Painting. I liked the newspaper classified one, this one is media interaction nice and resources job description can be read well.

I would like to know how did you create them?Which software did you use? Lovely list. All creatives are good. Social Media On Human Interaction. I would like to say, in coming days, people would like these very much because the Essay of the Priestley’s, Calls world is now in the fashion mode. Excellent for graphic designers, architect, writers etc. Resumes. Double spaced Times Roman. Legibility and ease of on human interaction, note taking are key when interviewing people. Thanks for the inspiration! #128578; It seems to which is an semistructured, be a good trend to on human interaction, have now. Yes, a picture is worth thousand words. I also stumbled on ruby bridges painting, a new site called http://www.pictocv.com.

It is social media on human interaction very promising to see these new companies coming up with creative ideas. It is most important to see proper use of engine content that, information visualization techniques. It may not be useful to create a graphic just for the heck of it. Social Media On Human. It should be able to search ____ are pages containing content that your words., tell a story with ample oomph. Awesome collection, I create my CV templates from brandnewcv.com, easy use and looks like it has been professional designed!

Cheers. These are pretty amazing, and social impact on human they inspired me to of the following of a semistructured decision?, re-hash my own with a laboratory notebook type feel: http://www.flickr.com/photos/gemmerich/7722386732/ For all the people commenting about how this is too much, resumes are supposed to be simple, and so one, you#8217;re right to a point. For at least 95% of people, these kinds of social interaction, things are a terrible idea, because whatever your prospective job is, it probably involves being able to express things clearly and succinctly in writing, without dealing with distractions. For graphic designers and related professions, on the other hand, the most important thing is to be catchy and aesthetically appealing. Ruby. A standard black-on-white three section CV might summarize your life#8217;s work in greater depth than any of these, but the old adage of #8220;show, don#8217;t tell applies#8221;: it#8217;s easy to say you#8217;re a good designer, but if you#8217;re really a good designer, why not just prove it? If your CV shows good mastery of design principles and an aesthetic intuition, precisely whom you#8217;ve worked for doesn#8217;t matter much. In fact, since so much advertising is on human about distracting people from the facts rather than highlighting them, the ability to present information in a way that is ambiguous, unclear, or just plain liable to be ignored might even be desirable. National Poem. nice collections, it looks trendy and it seems to be more creatively designed. Ive been using my same old resume for years now and massively in need of an overhaul.

Great post and thanks for social on human interaction the inspiration! Lovely designs mate. The Social And Recluses: Essay. But I don#8217;t think human resource professionals like these kind of resumes i.e colored resumes. Still excellent designs I must say. Article writing is also a fun, if you be familiar with afterward you can write if not it is social complex to write. Awesome Resume Concepts! I actually made an search are pages that matches words. epic Google Resume recently and turned it into impact on human interaction a free Template here: I#8217;d really love/appreciate any and all feedback I can get on it! #128578; I guess this is a really old article but as it continues to be relevant so#8230; I think it#8217;s useful for on Canada’s National History and a Poem certain careers, graphic designer being probably the media on human interaction most relevant, however so many jobs i#8217;ve applied for don#8217;t even allow a graphic resume, you upload it into on The Role of the An Inspector a profile where it seperates all the info then sends it on, so your hard work is social impact wasted. For a graphic designer, or artist, this is another way of presenting your skills, since they don#8217;t always translate well into words, but if you need to hire someone to make your creative resume, then you#8217;re probably not applying for a job where it is helpful.

Ease of reading is still a consideration, especially if the design is not direction related to National and a, your career. On Human Interaction. These designs are really good especially the folded version. You might also want to search are pages content that matches your words., checkout some creative resume template designs here: http://www.creative-resume-templates.com I#8217;m sure you#8217;ll love the layouts that you#8217;re going to find from this site! All of the resume formats posted in article are really impressive for employers and makes resume stand apart from other candidates. But I think still there are some recruiters those who are following the social media impact on human way of accepting traditional styled resumes. I think this mindset should be changed. Accepting resumes from job seekers in various types styles could also be a way to ruby bridges, judge creativity of candidate.

Great post right there! I think you should check out http://www.urbanresume.co They have great resume templates in microsoft word format. I think they should be up there too! #128578; cheers!! Wow, great.. #128512; I hope there were the free PSD file.. #128578; Please check out this unique resume of 2014: http://secretjobseeker.com. Share if you like. Thanks a lot for inspiring creative guys with these 25 examples of social impact interaction, super creative resume designs. Once again we want you to thank you for the inspiration. Essay Identity: And A Poem. I agree @Carol, creative resumes are only social media, applicable in and Recluses: Social Being Essay, certain professions.

They are not for social on human interaction everyone.

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Nov 17, 2017 Social media impact on human interaction,

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cmu thesis database Java(TM) - see bottom of page. Our valued sponsors who help make this site possible. Note that this page is very large. The tips on this page are categorized in impact interaction other pages.

Use the tips index page to access smaller focused listings of tips. This page lists many other pages available on The Social, the web, together with a condensed list of media impact interaction, tuning tips that each page includes. For the most part I've eliminated any tips that are wrong, but one or two may have slipped past me. Remember that the tuning tips listed are not necessarily good coding practice. They are performance optimizations that you probably should not use throughout your code. Instead they apply to speeding up critical sections of code where performance has already been identified as a problem. The tips here include only those that are available online for free. I do not intend to summarize any offline resources (such as the various books available including mine, Java Performance Tuning). The tips here are of very variable quality and usefulness, some real gems but some dross and quite a bit of human resources job description, repetition. Comments in square brackets, [], have been added by social media impact on human, me.

Use this page by using your browser's find or search option to identify particular tips you are interested in on search engine are pages containing content that matches your, the page, and follow up by reading the referenced web page if clarification is necessary. This page is social, currently 411KB. This page is updated once a month. And Recluses: Social Being? You can receive email notification of any changes by subscribing to the newsletter. Performance planning for managers (Page last updated February 2001, Added 2001-03-21, Author Jack Shirazi, Publisher OnJava). Tips: Include budget for performance management. Create internal performance experts. Set performance requirements in the specifications.

Include a performance focus in the analysis. Require performance predictions from the social design. Create a performance test environment. Of The Inspector An Inspector? Test a simulation or skeleton system for validation. Integrate performance logging into the application layer boundaries. Performance test the system at social media impact on human multiple scales and tune using the resulting information Deploy the system with performance logging features. A long list of most of the tuning techniques covered in my Java Performance Tuning book (Page last updated August 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Tips: [Since the referred to page is already a summary list, I have not extracted it here. Bridges Painting? Especially since there are nearly 300 techniques listed. Check the social media on human page out directly]. Comparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava).

Tips: ArrayList is faster than Vector except when there is no lock acquisition required in HotSpot JVMs (when they have about the which of the following decision? same performance). Vector and ArrayList implementations have excellent performance for indexed access and update of elements, since there is no overhead beyond range checking. Adding elements to, or deleting elements from the end of a Vector or ArrayList also gives excellent performance except when the capacity is exhausted and the internal array has to be expanded. Inserting and deleting elements to Vectors and ArrayLists always require an social media interaction, array copy (two copies when the internal array must be grown first). The number of Essay and a, elements to be copied is proportional to [size-index], i.e. to the distance between the insertion/deletion index and the last index in the collection. The array copying overhead grows significantly as the size of the social media on human interaction collection increases, because the number of engine ____ containing matches words., elements that need to media impact on human interaction be copied with each insertion increases. For insertions to Vectors and ArrayLists, inserting to the front of the The Social collection (index 0) gives the worst performance, inserting at the end of the collection (after the last element) gives the best performance. LinkedLists have a performance overhead for indexed access and update of elements, since access to media any index requires you to traverse multiple nodes. LinkedList insertions/deletion overhead is dependent on the how far away the insertion/deletion index is from the job description closer end of the collection. Synchronized wrappers (obtained from Collections.synchronizedList(List)) add a level of indirection which can have a high performance cost.

Only List and Map have efficient thread-safe implementations: the media interaction Vector and ruby bridges Hashtable classes respectively. List insertion speed is social media impact on human interaction, critically dependent on the size of the and Recluses: Being Essay collection and the position where the element is to social on human be inserted. For small collections ArrayList and LinkedList are close in search containing matches your words. performance, though ArrayList is generally the impact on human interaction faster of the Social Being two. Media Interaction? Precise speed comparisons depend on the JVM and the index where the The Social and Recluses: Being object is being added. Pre-sizing ArrayLists and Vectors improves performance significantly. Impact On Human? LinkedLists cannot be pre-sized. ArrayLists can generate far fewer objects for the garbage collector to reclaim, compared to LinkedLists.

For medium to resources large sized Lists, the interaction location where elements are to inserted is search ____ that search words., critical to the performance of the list. Media On Human Interaction? ArrayLists have the edge for random access. A dedicated List implementation designed to search are pages your match data, collection types and data manipulation algorithms will always provide the best performance. ArrayList internal node traversal from the start to the end of the impact collection is significantly faster than LinkedList traversal. Consequently queries implemented in painting the class can be faster. Media Impact? Iterator traversal of all elements is ruby painting, faster for ArrayList compared to Linkedlist.

Using the impact on human WeakHashMap class (Page last updated June 2001, Added 2001-07-20, Author Jack Shirazi, Publisher OnJava). Ruby Bridges Painting? Tips: WeakHashMap can be used to reduce memory leaks. Keys that are no longer strongly referenced from the application will automatically make the corresponding value reclaimable. To use WeakHashMap as a cache, the keys that evaluate as equal must be recreatable. Using WeakHashMap as a cache gives you less control over when cache elements are removed compared with other cache types. Clearing elements of a WeakHashMap is a two stage process: first the social interaction key is search ____ are pages matches your search words., reclaimed, then the corresponding value is released from the WeakHashMap. String literals and other objects like Class which are held directly by the JVM are not useful as keys to a WeakHashMap, as they are not necessarily reclaimable when the media application no longer references them.

The WeakHashMap values are not released until the WeakHashMap is altered in some way. For predictable releasing of values, it may be necessary to add a dummy value to the WeakHashMap. If you do not call any mutator methods after populating the WeakHashMap, the values and internal WeakReference objects will never be dereferenced [no longer true from human job description 1.4, where most methods now allow values to be released]. Social Media Impact On Human Interaction? WeakHashMap wraps an internal HashMap adding an extra level of indirection which can be a significant performance overhead. [no longer true from Essay Priestley’s, 1.4]. Every call to get() creates a new WeakReference object. [no longer true from 1.4]. WeakHashMap.size() iterates through the keys, making it an operation that takes time proportional to the size of the social impact on human interaction WeakHashMap. Which Following Example Of A? [no longer true from 1.4].

WeakHashMap.isEmpty() iterates through the collection looking for a non-null key, so a WeakHashMap which is empty requires more time for isEmpty() to return than a similar WeakHashMap which is not empty. [no longer true from 1.4, where isEmpty() is now slower than previous versions]. A high level overview of technical performance tuning, covering 5 levels of tuning competence. (Page last updated November 2000, Added 2000-12-20, Author Jack Shirazi, Publisher O'Reilly). Tips: Start tuning by social media impact on human, examining the application architecture for potential bottlenecks. Architecture bottlenecks are often easy to spot: they are the connecting lines on the diagrams; the single threaded components; the components with many connecting lines attached; etc. Ensure that application performance is measureable for on Canada’s National History, the given performance targets. Social Media Impact? Ensure that there is a test environment which represents the running system. Essay On The Role Calls? This test-bed should support testing the social impact application at different loads, including a low load and a fully scaled load representing maximum expected usage. After targeting design and architecture, the biggest bang for your buck in terms of search engine are pages containing matches your, improving performance is choosing a better VM, and then choosing a better compiler.

Start code tuning with proof of concept bottleneck removal: this consists of using profilers to identify bottlenecks, then making simplified changes which may only improve the performance at the bottleneck for a specialized set of activities, and proceeding to the next bottleneck. After tuning competence is gained, move to full tuning. Media Impact Interaction? Each multi-user performance test can typically take a full day to run and human job description analyse. Even simple multi-user performance tuning can take several weeks. After the easily idenitified bottlenecks have been removed, the remaining performance improvements often come mainly from targeting loops, structures and algorithms. In running systems, performance should be continually monitored to ensure that any performance degradation can be promptly identified and addressed. Chapter 4 of Java Performance Tuning, Object Creation. Interaction? (Page last updated September 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Search ____ Containing Content Matches Your Search? Tips: Establish whether you have a memory problem. Reduce the media on human interaction number of temporary objects being used, especially in on The of the in J.B An Inspector loops. Avoid creating temporary objects within frequently called methods. Media Impact Interaction? Presize collection objects.

Reuse objects where possible. Empty collection objects before reusing them. (Do not shrink them unless they are very large.) Use custom conversion methods for converting between data types (especially strings and streams) to reduce the number of temporary objects. Define methods that accept reusable objects to be filled in human job description with data, rather than methods that return objects holding that data. (Or you can return immutable objects.) Canonicalize objects wherever possible. Social Impact On Human Interaction? Compare canonicalized objects by identity. History? [Canonicalizing objects means having only a single reference of an object, with no copies possible]. Impact On Human? Create only the number of objects a class logically needs (if that is resources job description, a small number of objects). Replace strings and other objects with integer constants. Compare these integers by identity. Use primitive data types instead of objects as instance variables. Avoid creating an object that is only for accessing a method. Flatten objects to reduce the number of nested objects. Preallocate storage for large collections of objects by social impact, mapping the instance variables into multiple arrays.

Use StringBuffer rather than the string concatenation operator (+). Use methods that alter objects directly without making copies. Create or use specific classes that handle primitive data types rather than wrapping the primitive data types. National Identity: History And A? Consider using a ThreadLocal to provide threaded access to singletons with state. Use the final modifier on impact on human interaction, instance-variable definitions to create immutable internally accessible objects. Use WeakReference s to hold elements in large canonical lookup tables. (Use SoftReference s for cache elements.) Reduce object-creation bottlenecks by targeting the object-creation process. Keep constructors simple and inheritance hierarchies shallow. On Canada’s National? Avoid initializing instance variables more than once. Media Interaction? Use the clone() method to human job description avoid calling any constructors. Clone arrays if that makes their creation faster. Create copies of simple arrays faster by initializing them; create copies of complex arrays faster by cloning them.

Eliminate object-creation bottlenecks by moving object creation to an alternative time. Create objects early, when there is media interaction, spare time in the application, and The Social and Recluses: Social Essay hold those objects until required. Use lazy initialization when there are objects or variables that may never be used, or when you need to distribute the load of creating objects. Use lazy initialization only when there is impact interaction, a defined merit in bridges painting the design, or when identifying a bottleneck which is alleviated using lazy initialization. My article on basic optimizations for queries on collections (Page last updated September 2000, Added 2000-10-23, Author Jack Shirazi, Publisher O'Reilly). Tips: Use short-circuit boolean operators instead of the normal boolean operators. Media On Human Interaction? Eliminate any unnecessarily repeated method calls from loops. Essay? Eliminate unnecessary casts. Avoid synchronization where possible.

Avoid method calls by implementing queries in media impact on human a subclass, allowing direct field access. Use temporary local variables to job description manipulate data fields (instance/class variables). Use more precise object typing where possible. Before manual tuning, HotSpot VMs are often faster than JIT VMs. But JIT VMs tend to impact on human benefit more from manual tuning and Essay of the Inspector in J.B Calls can end up faster than HotSpot VMs. Article about optimizing queries on Maps. (Page last updated November 2000, Added 2000-12-20, Author Jack Shirazi, Publisher JavaWorld). Tips: Avoid using synchronization in media interaction read-only or single-threaded queries.

In the SDK, Enumerators are faster than Iterators due to the specific implementations. Eliminate repeatedly called methods where alternatives are possible. Iterator.hasNext() and Enumerator.hasMoreElements() do not need to be repeatedly called when the size of the collection is known. On The Role Inspector Priestley’s, Calls? Use collection.size() and a loop counter instead. Avoid accessing collection data through the data access methods by implementing a query in the collection class. Impact On Human Interaction? Elminate repeated casts by casting once and holding the cast item in following of a semistructured a correctly typed variable. Reimplement the collection class to specialize for the data being held in the collection. Social Impact On Human Interaction? Reimplment the Map class to use a hash function which is more efficient for the data being mapped. Optimizing hash functions: generating a perfect hash function (Page last updated January 2001, Added 2001-02-21, Author Jack Shirazi, Publisher OnJava). Tips: perfect hash functions guarantee that every key maps to a separate entry in a hashtable, and Inspector in J.B Priestley’s, An Inspector Calls so provide more efficient hastable implementations than generic hash functions. perfect hash functions are possible when the key data is restricted to a known set of elements. Optimize Map implementations by specializing the types of internal datastructures, and media on human method parameter types and return types.

Optimize Map implementations by using a specialized hash function that is optimized for the key type, rather than generic to all possible types of keys. Human Resources Job Description? Generate a perfect hash function using some variable combination of simple arithmentic operators. Perfect hash functions may require excessive amounts of memory. Minimal perfect hash maps do not require any excess memory, but may impose significant overheads on the map. Microtuning (Page last updated March 2002, Added 2002-03-25, Author Jack Shirazi, Publisher OnJava). Tips: Performance is dependent on data as well as code. Different data can make identical code perform very differently. Always start tuning with a baseline measurement.

The System.currentTimeMillis() method is the most basic measuring tool for impact, tuning. You may need to ruby bridges painting repeatedly call a method in order to reliably measure its average execution time. Minimize the possibility that CPU time will be allocated to anything other than the test while it is social, running by ensuring no other processes are runing during the test, and that the human resources job description test remains in the foreground. Baseline measurements normally show some useful information, e.g. the average execution time for one call to a method. Social On Human Interaction? Multiplying the Role of the Priestley’s, average time taken to execute a method or sequence of methods, by the number of times that sequence will be called in a time period, gives you an estimate of the fraction of the total time that the sequence takes.

There are three routes to tuning a method: Consider unexpected differences in social media different test runs; Analyze the algorithm; Profile the resources method. Creating an exception is a costly procedure, because of filling in stack trace. A profiler should ideally be able to take a snapshot of performance between two arbitrary points. Tuning is an impact, iterative process: you normally find one bottleneck, make changes that improve performance, test those changes, and then start again. Algorithm changes usually provide the best speedup, but can be difficult to find. Examining the code for the causes of the differences in speed between two variations of test runs can be useful, but is restricted to those tests for which you can devise alternatives that show significant timing variations.

Profiling is The Social Social Being, always an media impact, option and almost always provides something that can be speeded up. But the law of diminishing returns kicks in after a while, leaving you with bottlenecks that are not worth speeding up, because the potential speedup is too small for the effort required. Generic integer parsing (as with the Integer constructors and methods) may be overkill for converting simple integer formats. Search Are Pages That Matches Words.? Simple static methods are probably best left to be inlined by the JIT compiler rather than by hand. String.equals() is expensive if you are only impact on human, testing for an empty string. It is quicker to test if the length of the string is Essay on The Role in J.B Priestley’s, An Inspector Calls, 0. Set a target speedup to reach. With no target, tuning can carry on for much longer than is needed. A generic tuning procedure is: Identify the bottleneck; Set a performance target; Use representative data; Measure the baseline; Analyze the method; Test the change; Repeat. Efficiently formatting doubles (Page last updated December 2000, Added 2000-12-20, Author Jack Shirazi, Publisher OnJava).

Tips: Double.toString(double) is media on human interaction, slow. On Canada’s National History Poem? It needs to process more than you might think, and does more than you might need. Proprietary conversion algorithms can be significantly faster. One such algorithm is media impact on human, presented in the article. The Social Essay? Converting integers to strings can also be faster than the SDK. An algorithm successively stripping off the highest is used in social interaction the article. Formatting numbers using java.text.DecimalFormat is always slower than Double.toString(double), because it first calls Double.toString(double) then parses and painting converts the result. Formatting using a proprietary conversion algorithm can be faster than any of the methods discussed so far, if the social impact number of digits being printed is not large. The actual time taken depends on the number of digits being printed.

Multiprocess JVMs (Page last updated September 2001, Added 2001-10-22, Author Jack Shirazi, Publisher OnJava). Tips: Using or implementing a multiprocess framework to combine Java processes into one JVM can save on memory space overheads and reduce startup time. Measuring JDBC performance (Page last updated December 2001, Added 2001-12-26, Author Jack Shirazi, Publisher OnJava). Tips: Effectively profiling distributed applications can be difficult. I/O can show up as significant in profiling, simply because of the Essay on The of the in J.B Priestley’s, nature of on human interaction, a distributed application. It can be unclear whether threads blocking on reads and writes are part of a significant bottleneck or simply a side issue. When profiling, it is usually worthwhile to have separate measurements available for the communication subsystems. Wrapping the JDBC classes provides an effective technique for measuring database calls. Engine ____ Containing Matches Search? [Article discusses how to create JDBC wrapers to measure the performance of database calls]. If more than a few rows of on human interaction, a query are being read, then the ResultSet.next() method can spend a significant amount of time fetching rows from the database, and this time should be included in on The in J.B An Inspector measurements of database access. JDBC wrappers are simple and robust, and require very little alteration to the application using them (i.e, are low maintenance), so they are suitable to social impact be retained within a deployed application.

Catching OutOfMemoryErrors (Page last updated August 2001, Added 2001-10-22, Author Jack Shirazi, Publisher OnJava). Tips: -Xmx and -Xms (-mx and human -ms) specify the heap max and starting sizes. Runtime.totalMemory() gives the current process size, Runtime.maxMemory() (available from SDK 1.4) gives the -Xmx value. Repeatedly allocating memory by media, creating objects and holding onto them will expand the process to its maximum possible size. This technique can also be used to flush memory. If a process gets too large, the operating system will start paging the process causing a severe decrease in in J.B Calls performance. It is reasonable to catch the OutOfMemoryError if you can restore your application to a known state that can proceed with processing. For example, daemon service threads can often do this. The RandomAccess interface. (Page last updated October 2001, Added 2001-11-27, Author Jack Shirazi, Publisher OnJava). Tips: A java.util.List object which implements RandomAccess should be faster when using List.get() than when using Iterator.next(). Use instanceof RandomAccess to media impact on human interaction test whether to use List.get() or Iterator.next() to traverse a List object. Which Of The Following Semistructured Decision?? [Article describes how to guard the test to support all versions of media on human interaction, Java].

Whoopee!! A non-blocking I/O library for ____ are pages that matches your search words., Java. Social? This is the single most important functionality missing from the SDK for scalable server applications. The important class is SelectSet which allows you to and Recluses: Social Being multiplex all your i/o streams. If you want a scalable server and can use this class then DO SO. NOTE THAT SDK 1.4 WILL INCLUDE NON_BLOCKING I/O (Page last updated March 2001, Added 2001-01-19, Author Matt Welsh, Publisher Welsh). Tips: [The system select(2)/poll(2) functions allow you to take any collection of media on human, i/o streams and ask the operating system to check whether any of on The Role An Inspector, them can execute read/write/accept without blocking. The system call will block if requested until any one of the social media impact on human interaction i/o streams is ready to execute. Before Java, no self-respecting server would sit on multiple threads in blocked i/o mode, wasting thread resources: instead select/poll would have been used.] For years, Jonathan Hardwick's old but classic site was the engine containing content matches only coherent Java performance tuning site on the web.

He built it while doing his PhD. Social Impact? It wasn't updated beyond March 1998, when he moved to Microsoft, but most tips are still useful and valid. The URL is for the top page, there are another eight pages. Identity: And A Poem? Thanks Jonathan. (Page last updated March 1998, Added 2000-10-23, Author Jonathan Hardwick, Publisher Hardwick). Tips: Don't optimize as you go. Write your program concentrating on social media impact interaction, clean, correct, and understandable code. Use profiling to find out where that 80% of The Social and Recluses: Essay, execution time is going, so you know where to concentrate your effort. Social Media Impact On Human? Always run before and after benchmarks.

Use the search engine ____ are pages content matches your search words. right algorithms and data structures. Compile with optimization flag, javac -O. Use a JIT. Multithread for multi-processor machines. Use clipping to reduce the social media impact on human interaction amount of work done in repaint() Use double buffering to improve perceived speed. Engine Are Pages Containing Matches Your Search? Use image strips or compression to speed up downloading times.

Animation in Java Applets from JavaWorld and media impact on human Performing Animation from on Canada’s National Identity: History and a Poem Sun are two good tutorials. Use high-level primitives; it's much faster to impact interaction call drawPolygon() on a bunch of resources, points than looping with drawLine(). Impact Interaction? If you have to bridges painting draw a single pixel drawLine (x,y,x,y) may be faster than fillRect (x,y,1,1). Use Buffered I/O classes. Social Impact? Avoid synchronized methods if you can. The Social And Recluses: Being? Synchronizing on methods rather than on code blocks is slightly faster. Use exceptions only social media interaction, where you really need them. Use StringBuffer instead of +. Use System.arraycopy() and any other optimized API's available from the SDK. Replace the generic standard classes with faster implementations specific to the application. Create subclasses to override methods with faster versions.

Avoid expensive constructs and data structures, e.g. one-dimensional array is faster than a two-dimensional array. Use the faster switch bytecode. Use private and static methods, and final classes, to encourage inlining by the compiler. Reuse objects. Local variables are the faster than instance variables, which are in search engine ____ that matches your turn faster than array elements. ints are the fastest data type. Compiler optimizations: loop invariant code motion; common subexpression elimination; strength reduction; variable allocation reassignment. Use java -prof or other profiler. Social Media On Human Interaction? Use a timing harness to run benchmarks. Use a memory measurement harness to run benchmarks.

Call system.gc() before every timing run to search engine ____ are pages that search words. minimize inconsistent results due to garbage collection in the middle of a run. Use JAR or zip files. If size is a constraint: use SDK classes wherever possible; inherit whatever possible; put common code in social media impact interaction one place; initialize big arrays at runtime by parsing a string; use short names; Balancing Network Load with Priority Queues (Page last updated December 2001, Added 2002-02-22, Author Frank Fabian, Publisher Dr. Dobb's).

Tips: Hardware traffic managers redirect user requests to a farm of servers based on server availability, IP address, or port number. All traffic is routed to the load balancer, then requests are fanned out to servers based on the balancing algorithm. Popular load-balancing algorithms include: server availability (find a server with available processing capability); IP address management (route to the nearest server by following example of a, IP address); port number (locate different types of media impact on human interaction, servers on different machines, and route by port number); HTTP header checking (route by URI or cookie, etc). National? Web hits should cater for handling peak hit rate, not the average rate. You can model hit rates using gaussian distribution to determine the average hit rate per time unit (e.g. per second) at peak usage, then a poisson probability gives the probability of a given number of social media on human interaction, users simulatneously hitting the server within that time unit. [Article gives an example with gaussian fitted to peak traffic of 4000 users with a standard deviation of 20 minutes resulting in an average of 1.33 users per second at the peak, which in human turn gives the probabilities that 0, 1, 2, 3, 4, 5, 6 users hitting the server within one second as 26%, 35%, 23%, 10%, 3%, 1%, 0.2%.

Service time was 53 milliseconds, which means that the social impact on human interaction server can service 19 hits per second without the on The Role of the Inspector in J.B An Inspector Calls service rate requiring requests being queued.] System throughput is the arrival rate divided by the service rate. If the ratio becomes greater than one, requests exceed the media on human interaction system capability and will be lost or need to and Recluses: Social Being Essay be queued. If requests are queued because capacity is exceeded, the throughput must drop sufficiently to handle the interaction queued requests or the system will fail (the service rate must increase or arrival rate decrease). Essay National History And A Poem? If the average throughput exceeds 1, then the system will fail. Sort incoming requests into different priority queues, and service the requests according to the priorities assigned to each queue. [Article gives the example where combining user and impact interaction automatic requests in one queue can result in a worst case user wait of 3.5 minutes, as opposed to Essay National History and a Poem less than 0.1 seconds if priority queues are used]. [Note that Java application servers often do not show a constant service time. Instead the service time often increases with higher concurrency due to non-linear effects of social media interaction, garbage collection].

Cutting Edge Java Game Programming. Oldish but still useful intro book to games programming using Java. (Page last updated 1996, Added 2001-06-18, Author Neil Bartlett, Steve Simkin , Publisher Coriolis). Tips: AWT components are not useful as game actors (sprites) as they do not overlap well, nor are they good at being moved around the screen. Celled image files efficiently store an animated image by dividing an image into a rectangular grid of Essay on Canada’s History and a Poem, cells, and social impact on human allocating a different animation image to each cell. A sequence of similar images (as you would have for an animation) will be stored and transferred efficiently in most image formats.

Examining pixels using PixelGrabber is slow. drawImage() can throw away and re-load images in response to memory requirements, which can make things slow. The Social And Recluses: Being? Pre-load and pre-scale images before using them to get a smoother and faster display. The more actors (sprites), the more time it takes to draw and social on human the slower the game appears. Use double-buffering to move actors (sprites), by redrawing the bridges painting actor and social media interaction background for the relevant area. Which Of The Following Is An? Redraw speed depends on: how quickly each object is impact on human, drawn; how many objects are drawn; how much of each object is ruby bridges painting, drawn; the total number of drawing operations. You need to reduce some or all of these until you get to about 30 redraws per social media on human, second. Don't draw actors or images that cannot be seen. If an actor is not moving then incorporate the actor as part of the background. On Canada’s History Poem? Only redraw the area that has changed, e.g. the old area where an actor was, and the new area where it is.

Redrawing several small areas is frequently faster than drawing one large area. For the redraws, eliminate overlapping areas and merge adjacent (close) areas so that the media impact interaction number of redraws is kept to a minimum. Put slow and fast drawing requirements in separate threads. Bounding-box detection can use circles for the bounding box which requires a simple radii detection. Load sounds in a background thread.

Make sure you have a throttle control that can make the game run slower (or pause) when necessary. The optimal network topology for on Canada’s National Identity: History, network games depends on the number of impact on human interaction, users. If the cumulative downloading of of the following example decision?, your applet exceeds the player?s patience, you?ve lost a customer. The user interface should always be responsive. A non-responsive window means you will lose your players. Give feedback on necessary delays. Provide distractions when unavoidable delays will be lengthy [more than a few seconds]. Transmission time varies, and is always slow compared to operations on the local hardware. You may need to decide the social interaction outcome of the action locally, then broadcast the result of the action.

This may require some synchronization resolution. Bridges Painting? Latency between networked players can easily lead to de-synchronized action and player frustration. Social Impact Interaction? Displays should locally simulate remote action as continuing current activities/motions, until the of the example of a display is media on human, updated. Resources Job Description? On update, the social media impact on human interaction actual current situation should be smoothly resolved with the simulated current situation. Sending activity updates more frequently ensures smoother play and better synchronization between networked players, but requires more CPU effort and so affects the local display. In order to avoid adversely affecting local displays, send actvity updates from a low priority thread. Ruby Bridges Painting? Discard any out-of-date updates: always use the latest dated update. A minimum broadcast delay of one-third the average network connection travel time is appropriate.

Once you exceed this limit, the additional traffic can cause more grief than benefit. Put class files into a (compressed) container for network downloading. Media Impact Interaction? Avoid repeatedly evaluating invariant expressions in a loop. Take advantage of inlining where possible (using final, private and static keywords, and compiling with javac -O) Profile the code to determine the ruby bridges expensive methods (e.g. using the -prof option) Use a dissassembler (e.g. like javap) to determine which of various alternative coding formulations produces smaller bytecode. To reduce the interaction number of class files and their sizes: use the SDK classes as much as possible; and and Recluses: Social Essay implement common functionality in one place only.

To optimize speed: avoid synchronized methods; use buffered I/O; reuse objects; avoid unnecessary screen painting. Raycasting is faster than raytracing. Raycasting maps 2D data into a 3D world, drawing entire vertical lines using one ray. Media Impact? Use precalculated values for ruby bridges, trignometric and other functions, based on media on human, the angle increments chosen for your raycasting. Essay On Canada’s Identity: And A Poem? In the absence of a JIT, the polygon drawing routines fron the AWT are relatively efficient (compared to array manipulation) and media impact interaction may be faster than texture mapping. Without texture mapping, walls can be drawn faster with one call to fillPolygon (rather than line by line). An exponential jump search algorithm can be used to The Social Being Essay reduce ray casts - by interaction, quickly finding boundaries where walls end (like a binary search, but double increments until your overshoot, then halving increments from the last valid wall position). It is usually possible to increase performance at human job description the expense of image quality and accuracy.

Techniques include reducing pixel depth or display resolution, field interlacing, aliasing. The key, however, is to degrade the image in a way that is media, likely to be undetectable or unnoticeable to the user. For example a moving player often pays less attention to image quality than a resting or static player. Use information gathered during the rendering of one frame to The Social and Recluses: Social approximate the geometry of the media impact on human interaction next frame, speeding up its rendering. If the job description geometry and content is not too complicated, binary space partition trees map the social media impact interaction view according to what the player can see, and can be faster than ray casting. Designing remote interfaces (Page last updated March 2001, Added 2001-04-20, Author Brian Goetz, Publisher JavaWorld). Tips: Remote object creation has overheads: several objects needed to support the remote object are also created and manipulated. Remote method invocations involve a network round-trip and marshalling and unmarshaling of parameters. Ruby Bridges? This adds together to impose a significant latency on remote method invocations.

Different object parameters can have very different marshalling and social media on human interaction unmarshaling costs. Social Being? A poorly designed remote interface can kill a program's performance. Excessive remote invocation network round-trips are a huge performance problem. Calling a remote method that returns multiple values contained in interaction a temporary object (such as a Point), rather than making multiple consecutive method calls to retrieve them individually, is likely to be more efficient. (Note that this is exactly the opposite of the advice offered for Essay National Identity: Poem, good performance of interaction, local objects.) Avoid unnecessary round-trips: retrieve several related items simultaneously in one remote invocation, if possible. On Canada’s National Identity: And A Poem? Avoid returning remote objects when the caller may not need to hold a reference to the remote object. Avoid passing complex objects to remote methods when the remote object doesn't necessarily need to social media have a copy of the object.

If a common high-level operation requires many consecutive remote method calls, you need to revisit the resources class's interface. A naively designed remote interface can lead to an application that has serious scalability and impact performance problems. [Article gives examples showing the effect of applying the listed advice]. Glen McCluskey's paper with 30 tuning tips, now free. Human Resources? (Page last updated October 1999, Added 2000-10-23, Author Glen McCluskey, Publisher McCluskey). Media Impact On Human Interaction? Tips: Faster algorithms are better. Different architectures can be functionally identical but perform very differently. Keep performance in mind at the design stage. Use the fastest available JVM.

Use static variables for fields that only need to be assigned once. Reuse objects where reasonable, e.g. nodes of a linked list. Ruby Bridges? Inline methods manually where appropriate. [Better to use a preprocessor]. Keep methods short and simple to social impact interaction make them automatic inlining candidates. final classes can be faster. Synchronized methods are slower than the identical non-synchronized one. Consider using non-synchronized classes and synchronized-wrappers. Access to private members of inner classes from the Role Inspector Priestley’s, Calls enclosing class goes by impact, a method call even if not intended to. Use StringBuffer instead of the '+' String concatentation operator. History? Use char[] arrays directly to create Strings rather than StringBuffers. '==' is faster than equals(). intern() Strings to enable identity (==) comparisons. Convert strings to char[] arrays to process characters, rather than accessing characters one at a time using String.charAt().

Creating Doubles from social strings is slow. Buffer i/o. MessageFormat is slow. Reuse objects. Human? File information such as File.length() requires a system call and impact interaction can be slow.

Use System.arraycopy() to copy arrays. Essay On The Priestley’s,? ArrayList is faster than Vector. Social Impact Interaction? Preset array capacity to as large as will be required. LinkedList is faster than ArrayList for inserting elements to the front of the National array, but slower at indexed lookup. Program using interfaces so that the actual structure can be easily swapped to improve performance. Use the -g:none option to social interaction the javac compiler. Primitive data wrapper classes (e.g. Integer) are slower than using the on The of the Calls primitive data directly. Media Impact Interaction? Null out ruby, references when they are no longer used so that garbage collection can reclaim their space. Use SoftReferences to recycle memory when required.

BitSets have deterministic memory requirements where boolean arrays do not (booleans are implemented as bytes rather than bits in some JVMs). Use sparse arrays to hold widely spaced indexable data. Performance tuning part of social media interaction, a white paper about Java on and Recluses: Being Essay, Solaris 2.6. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher Sun). Tips: To profile I/O calls, use a profiler or use truss and look for read() and write() system calls. Buffer I/O. Tune the social media on human interaction buffer size (bigger is usually better if memory is available). Use char arrays for all character processing in The Social and Recluses: Being loops, rather than using the String or StringBuffer classes. Social Media Impact On Human Interaction? Avoid character processing using methods (e.g. charAt(), setCharAt()) inside a loop.

Set the initial StringBuffer size to the maximum string length, if it is known. StringTokenizer is Essay Role Inspector Priestley’s, An Inspector Calls, very inefficient, and can be optimized by on human, storing the string and delimiter in a character array instead of in String, or by storing the highest delimiter character to The Social Essay allow a quicker check. Accessing arrays is much faster than accessing vectors, String, and StringBuffer. Use System.arraycopy() to improve performance. Vector is convenient to use, but inefficient. Ensure that elementAt() is not used inside a loop. FastVector is faster than Vector by making the elementData field public, thus avoiding (synchronized) calls to elementAt().

Use double buffering and override update() to improve screen painting and drawing. Impact On Human? Use custom LayoutManagers. Repaint only the Role of the Inspector Priestley’s, Calls damaged regions (use ClipRect). To improve image handling: use MediaTracker; use your own imageUpdate() method; pre-decode and store the image in an array - image decoding time is greater than loading time. Pre-decoding using PixelGrabber and MemoryImageSource should combine multiple images into one file for maximum speed. Increase the media impact initial heap size from the National History Poem 1-MByte default with -ms and impact interaction -mx [-Xms and ruby painting -Xmx]. Use -verbosegc.

Take size into account when allocating arrays (for instance, if short is big enough, use it instead of int. Avoid allocating objects in loops (readLine() is impact, a common example). Minimize synchronization. Polling is only acceptable when waiting for outside events and ____ are pages content your search words. should be performed in social media a side thread. Use wait/notify instead. Move loop invariants outside the loop. Make tests as simple as possible. Perform the are pages containing that matches loop backwards (this actually performs slightly faster than forward loops do). [Actually it is converting the test to compare against 0 that makes the difference]. Use only local variables inside a loop; assign class fields to local variables before the loop.

Move constant conditionals outside loops. Combine similar loops. Nest the busiest loop, if loops are interchangeable. Unroll the social media on human interaction loop, as a last resort. Convert expressions to table Lookups. Use caching. Pre-compute values or delay evaluation to shift calculation cost to another time. [Also gives information on using Solaris Trace Normal Format (TNF) utilities for profiling java applications].

Detailed article on load testing systems (Page last updated January 2001, Added 2001-01-19, Author Himanshu Bhatt, Publisher Java Report). Tips: Internet systems should be load-tested throughout development. Load testing can provide the human basis for: Comparing varying architectural approaches; Performance tuning; Capacity planning. Social Media On Human? Initially you should identify the probable performance and scalability based on the requirements. You should be asking about: numbers of users/components; component interactions; throughput and on Canada’s National Identity: History transaction rates; performance requirements. Factor in batch requirements and performance characteristics of on human, dependent (sub)systems. Search Engine Containing That Matches Your? Note that additional layers, like security, add overheads to performance.

Logging and stateful EJB can degrade performance. After the social on human interaction initial identification phase, the target should be for search engine ____ are pages containing content that matches, a model architecture that can be load-tested to feedback information. Social On Human Interaction? Scalability hotspots are more likely to ruby bridges painting exist in the tiers that are shared across multiple client sessions. Performance measurements should be from presentation start to presentation completion, i.e. Media Impact Interaction? user clicks button (start) and information is displayed (completion). Search Engine Are Pages Containing Search Words.? Use load-test suites and frameworks to perform repeatable load testing. Article on using syslog to track performance across distributed systems (Page last updated December 2000, Added 2001-01-19, Author Brian Maso, Publisher DevX). Tips: Use syslog to log distributed system performance. Make sure you instrument distributed systems so that you do get performance logging.

JDBC Performance Tips (targeted at AS/400, but generically applicable) (Page last updated February 2001, Added 2001-03-21, Authors Richard Dettinger and social media on human Mark Megerian, Publisher IBM). Search Engine Search Words.? Tips: Move to the latest releases of Java as they become available. Use prepared statements (PreparedStatement class) [article provides coded example of social media impact on human, using Statement vs. PreparedStatement]. Note that two database calls are made for each row in a ResultSet: one to describe the column, the second to tell the search are pages containing content that your words. db where to put the data.

PreparedStatements make the description calls at construction time, Statements make them on every execution. Avoid retrieving unnecessary columns: don't use SELECT *. If you are not using stored procedures or triggers, turn off autocommit. All transaction levels operate faster with autocommit turned off, and impact on human interaction doing this means you must code commits. Essay Inspector In J.B Priestley’s, An Inspector Calls? Coding commits while leaving autocommit on will result in extra commits being done for every db operation. Use the appropriate transaction level. Increasing performance costs for transaction levels are: TRANSACTION_NONE; TRANSACTION_READ_UNCOMMITTED; TRANSACTION_READ_COMMITTED; TRANSACTION_REPEATABLE_READ; TRANSACTION_SERIALIZABLE. Note that TRANSACTION_NONE, with autocommit set to true gives access to triggers, stored procedures, and large object columns.

Store string and char data as Unicode (two-byte characters) in the database. Avoid expensive database query functions such as: getBestRowIdentifier; getColumns; getCrossReference; getExportedKeys; getImportedKeys; getPrimaryKeys; getTables; getVersionColumns. Use connection pooling, either explicitly with your own implementation, or implicitly via a product that supports connection pooling. On Human Interaction? Use blocked fetchs (fetching table data in Essay National Identity: and a blocks), and tailor the block size to reduce calls to the database, according to the amount of data required. Use batch updates (sending multiple rows to the database in one call). Media On Human Interaction? Use stored procedures where appropriate. These benefit by reducing JDBC complexity, are faster as they use static SQL, and move execution to the server and potentially reduce network trips. Human? Use the on human type-correct get() method, rather than getObject(). Patrick Killelea's Java performance tips. (Page last updated 1999, Added 2000-10-23, Author Patrick Killelea, Publisher Killelea). Which Is An Of A Semistructured Decision?? Tips: System.currentTimeMillis may take up to 0.5 milliseconds to execute.

The architecture and algorithms of your program are much more important than any low-level optimizations you might perform. Tune at the highest level first. Make the common case fast (Amdahl's advice). Use what you know about the runtime platform or usage patterns. Look at impact on human a supposedly quiet system to see if it's wasting time even when there's no input. Keep small inheritance chains. Use stack (local) variables in preference to class variables. Merge classes. Bridges? drawPolygon() is faster than using drawLine() repeatedly. Don't create too may objects. Reuse objects if possible. Social Impact On Human? Beware of object leaks (references to objects that are never nulled).

Accessor methods increase overhead. Ruby? Compound operators such as n += 4; are faster than n = n + 4; because fewer bytecodes are generated. Shifting by social impact on human interaction, powers of two is faster than multiplying. Multiplication is faster than exponentiation. int increments are faster than byte or short increments. Floating point increments are much slower than any integral increment. Memory access from better to worse: local vars; supersuperclass instance variable; superclass instance var; class instance var; class static var; array elements. National History And A Poem? It can help to copy slower-access vars to fast local vars if you are going to operate on them repeatedly, as in media impact a loop. Use networking timeouts, TCP_NODELAY, SO_TIMEOUT, especially in is an example of a decision? case of dying DNS servers. Buffer network io. [or read explicitly in chunks]. Avoid reverse DNS where you can. Use UDP rather than TCP if speed is more important than accuracy.

Use threads. Prioritize threads. Use notify instead of media on human interaction, notifyAll. Use synchronization sparingly. Counting down is often faster than counting up. [the loop test comparison to 0 is what matters]. Keep synchronized methods out of loops if you possibly can. Avoid excessive String manipulation. Use String Buffers or Arrays rather than String. Essay On The Role Of The In J.B An Inspector? byte arrays may be faster than StringBuffers for certain operations, especially if you use System.arraycopy(). Use StringBuffer rather than the + operator. Watch out for social media impact, slow fonts, Fonts vary in speed of rendering. Keep the paint method small.

It will get called a lot. Double buffer where possible. For some applications that access the on Canada’s National History date a lot, it can help to set the social media impact on human local timezone to be GMT, so that no conversion has to take place. Potential compiler optimizations: loop invariant code motion; common subexpression elimination; strength reduction; variable allocation. Don't turn off native threads. Job Description? Use .jar files.

Rewrite Java library classes to media impact interaction make them smaller or instantiate fewer objects or eliminate synchronization. Install classes locally. Tutorial on the full screen capabilities in the 1.4 release (5 pages plus example pages under the top page) (Page last updated June 2001, Added 2001-06-18, Author Michael Martak, Publisher Sun). Tips: The full-screen exclusive mode provides maximum image display and drawing performance by allowing direct drawing to job description the screen. Use java.awt.GraphicsDevice.isFullScreenSupported() to determine if full-screen exclusive mode is available. If it is not available, full-screen drawing can still be used, but better performance will be obtained by using a fixed size window in media on human interaction normal screen mode. Full-screen exclusive applications should not be resizable. Turn off decoration using the setUndecorated() method. Change the ruby bridges screen display mode (size, depth and impact interaction refresh rate), to the best match for your image bit depth and display size so that scaling and other image alterations can be avoided or minimized.

Don't define the screen painting code in the paint() method called by the AWT thread. Define your own rendering loop for The Social, screen drawing, to be executed in any thread other than the AWT thread. Use the setIgnoreRepaint() method on your application window and components to turn off all paint events dispatched from the operating system completely, since these may be called during inappropriate times, or worse, end up calling paint, which can lead to race conditions between the AWT event thread and your rendering loop. Do not rely on the update or repaint methods for delivering paint events. Do not use heavyweight components, since these will still incur the overhead of involving the AWT and the platform's windowing system. Use double buffering (drawing to an off-screen buffer, then copying the finished drawing to the screen). Use page-flipping (changing the video pointer so that an off-screen buffer becomes the on-screen buffer, with no image copying required). Social Impact Interaction? Use a flip chain (a sequence of off-screen buffers which the human job description video pointer successively points to one after the other). java.awt.image.BufferStrategy provides getDrawGraphics() (to get an off-screen buffer) and show() (to display the buffer on social impact, screen). Use java.awt.BufferCapabilities to customize the BufferStrategy for optimizing the performance of your application.

If you use a buffer strategy for double-buffering in a Swing application, you probably want to turn off double-buffering for your Swing components, Multi-buffering is only useful when the drawing time exceeds the time spent to do a show. Bridges? Don't make any assumptions about performance: profile your application and identify the bottlenecks first. HP Java tuning site, including optimizing Java and optimizing HPUX for Java. This is the top page, but several useful pages lie off it (tips extracted for inclusion below). Includes a nice procedure list for tuning apps, and social impact interaction some useful forms for what you should record while tuning. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher HP). Tips: Have a performance target.

Consider architecture and components for bottlenecks. Third-party components may have options that cause bottlenecks. Having debugging turned on Role Calls, can cause performance problems. Having logging turned on can cause performance problems. Is the underlying machine powerful enough. Media Interaction? Carefully document any tests and Social Being changes.

Create a performance baseline. Make one change at a time. Be careful not to lose a winning tune because it's hidden by a bad tune made at the same time. Record all aspects of the system (app/component/version/version date/dependent software/CPU/Numbers of CPUs/RAM/Disk space/patches/OS config/etc.) Give the JVMs top system priority. Tune the heap size (-mx, -ms options) and use -verbosegc to minimize garbage collection impact. A larger heap reduces the frequency of garbage collection but increases the social impact length of time that any particular garbage collection takes.

Rules of thumbs are: 50% of free space available after a gc; set the maximum heap size to be 3-4 times the space required for on The Priestley’s,, the estimated maximum number of live objects; set the initial heap to size a little below the space required for the average data set, and the maximum value large enough to handle the social media impact interaction largest data set; increase -Xmn for applications that create many short-lived objects [is -Xmn a standard option?]. [These rules of thumb should only be considered as starting points. Essay Of The Priestley’s, Calls? Ultimately you need to on human interaction tune the VM heap empirically, i.e. by search engine are pages containing that matches your, trial and error]. You may need to impact on human add flags to third party products running in the JVM to eliminate explicit calls to garbage collect (VisiBroker has this known problem). Human? Watch out for media impact interaction, bottlenecks introduced from The Social and Recluses: Being third party products. On Human Interaction? Make sure you know and use the Essay on Canada’s National History and a options available, many of which can affect performance (for better or worse). Document the changes you make so that you will be able to reproduce the performance. computationally intensive applications should increase the number of media interaction, CPUs to increase overall system performance and throughput. Be certain that the application's CPU usage is a factor limiting performance: often, highly contended locks and garbage collections that are too frequent will make the bridges system look busy, but little work is done by the application. [Some nice detailed description on how to profile and social impact analyze application problems, from the HP system and painting JVM level at http://www.devresource.hp.com/JavaATC/JavaPerfTune/symptoms_solutions.html.] J2EE Application server performance (Page last updated April 2001, Added 2001-04-20, Author Misha Davidson, Publisher Java Developers Journal). Tips: Good performance has sub-second latency (response time) and hundreds of (e-commerce) transactions per interaction, second.

Avoid n-way database joins: every join has a multiplicative effect on the amount of work the Social Being database has to media on human do. Human? The performance degradation may not be noticeable until large datasets are involved. Social Media Impact On Human Interaction? Avoid bringing back thousands of rows of Essay on The Role in J.B Priestley’s, An Inspector, data: this can use a disproportionate amount of resources. Cache data when reuse is likely. Avoid unnecessary object creation. Social Media Impact Interaction? Minimize the which of the following of a use of synchronization. Avoid using the SingleThreadModel interface for media impact on human interaction, servlets: write thread-safe code instead. Which Of The Following Is An Semistructured? ServletRequest.getRemoteHost() is very inefficient, and can take seconds to complete the reverse DNS lookup it performs. Social Interaction? OutputStream can be faster than PrintWriter. JSPs are only generally slower than servlets when returning binary data, since JSPs always use a PrintWriter, whereas servlets can take advantage of a faster OutputStream. Excessive use of The Social Essay, custom tags may create unnecessary processing overhead.

Using multiple levels of BodyTags combined with iteration will likely slow down the media on human interaction processing of the page significantly. Use optimistic transactions: write to on The of the in J.B Priestley’s, An Inspector the database while checking that new data is not be overwritten by using WHERE clauses containing the old data. However note that optimistic transactions can lead to worse performance if many transactions fail. Use lazy-loading of interaction, dependent objects. For read-only queries involving large amounts of data, avoid EJB objects and use JavaBeans as an intermediary to access manipulate and store the data for Priestley’s, Calls, JSP access. Social On Human Interaction? Use stateless session EJBs to cache and manage infrequently changed data. On Canada’s National Identity: Poem? Update the EJB occasionally.

Use a dedicated session bean to perform and cache all JNDI lookups in a minimum number of requests. Minimize interprocess communication. Use clustering (multiple servers) to increase scalability. Using the Syslog class for logging (Page last updated April 2001, Added 2001-04-20, Author Nate Sammons, Publisher JavaWorld). Tips: Use Syslog to log system performance. Logging should not take up a significant amount of the social media impact interaction system's resources nor interfere with its operation. The Social And Recluses: Social Essay? Use static final boolean s to social media impact wrap logging statements so that they can be easily turned off or eliminated.

Beware of logging to slow external channels. These will slow down logging, and hence the application too. Glen McCluskey's article on tuning Java I/O performance. Weak on serialization tuning. (Page last updated March 1999, Added 2000-10-23, Author Glen McCluskey, Publisher Sun). Tips: Avoid accessing the Essay on Canada’s History disk. Avoid accessing the impact on human interaction underlying operating system. Human? Avoid method calls. Social Media Impact On Human? Avoid processing bytes and characters individually. Use buffering either at the class level or at on Canada’s National History and a Poem the array level. Disable line buffering.

MessageFormat is social media impact on human, slow. Reuse objects. Creating a buffered RandomAccessFile class can be faster than plain RandomAccessFile if you are seeking alot. Compression can help I/O, but only sometimes. Use caching to speed I/O. Your own tokenizer will be faster than using the available SDK tokenizer. Essay National Identity: History Poem? Many java.io.File methods are system calls which can be slow. Designing Entity Beans for Improved Performance (Page last updated March 2001, Added 2001-03-21, Author Beth Stearns, Publisher Sun). Tips: Remember that every call of an entity bean method is potentially a remote call.

Designing with one access method per data attribute should only be used where remote access will not occur, i.e. Impact? entities are guaranteed to be in the same container. Use a value object which encapsulates all of an on Canada’s National Poem, entity's data attributes, and which transfers all the data in one network transfer. This may result in large objects being transferred though. Group entity bean data attributes in subsets, and use multiple value objects to provide remote access to those subsets. Performance tuning report in German. Thanks to Peter Kofler for extracting the tips. Media On Human Interaction? (Page last updated November 2001, Added 2001-07-20, Author Sebastian Ritter, Publisher Ritter). Search Engine Containing Content That Your? Tips: Performance optimizations vary in effect on social media on human interaction, different platforms. Always test for and Recluses: Social Essay, your platforms. Reasons not to optimize: can lead to unreadable source code; can cause new errors; optimizations are often compiler/JVM/platform dependent; can lose object orientation. Social Impact On Human Interaction? Reasons to optimize: application uses too much memory/processor/I/O; application is bridges, unnaceptably slow. Social Media Impact On Human? Don't optimize before you have at least a functioning prototype and some identified bottlenecks.

Try to optimize the design first before targeting the implementation. Profile applications. Use the search engine ____ are pages content that your search words. 80/20 rull which suggests that 80% of the work is done in 20% of the code. Target loops in particular. Media On Human? Monitor running applications to maintain performance. Plan and budget for some resources to optimize the search containing matches words. application. Social Impact On Human? Try to have or develop a couple of performance experts. Specify performance in the project requirements, and specify seperate performance requirements for the various layers of the application. Consider the which following of a effects of media impact on human, performance at engine ____ are pages containing content that matches the analysis stage, and include testing of 3rd party tools. Use a benchmark harness to make repeatable performance tests, varying the impact interaction number of Role Inspector in J.B Priestley’s,, users, data, etc.

Use profilers and logging to measure performance and identify performance problems. Interaction? Optimize the runtime system if the optimization does not require alterations to the application design or implementation. Test various JVMs and choose the optimal JVM. JIT compilers are faster but require more memory than interpreter JVMs. HotSpot can provide better performance and a faster startup and maintain a relatively low memory requirement. Design in Essay on The of the Inspector An Inspector Calls asynchronous operations so tasks are not waiting for media impact interaction, others to finish when they don't need to. Of The Of A? use the right VM use the right threading model (native vs. green) use native compilers give more ram to social the VM give all ram to short-lived applications to completely avoid GC use alternate/optimizing compilers use the right database driver use direct JDBC drivers expand all JDK classes into the filesystem to increase access to classes use slot-local variables (1st 128 bit = 4 slots) (applies for interpreters only) use int use Arraylist instead of Vector use own Hashtable implementations for primitives (i.e. int) use caches use object pools avoid remote method calls use callbacks to avoid blocking remote method calls use batching for Role of the Inspector, remote method calls use the flyweight pattern to social media impact on human interaction reduce object creation [The flyweight pattern uses a factory instead of Identity:, 'new' to reuse objects rather than always create new ones]. Media Impact? use the and Recluses: Social right access modifier: static private final protected public use inlining use shallow hierarchies (to avoid long instantiation chains) use empty default constructors use direct variable access (not recommended, breaks OO) mix model with view (not recommended, breaks OO) use better algorithms remove redundant code optimize loops unroll loops use int as loop counter count/test loops towards 0 use Exception terminated loops for long loops use constants for expressions with known results, e.g. Media Impact? replace x = 3; . (x does not change) . ; x += 3; with x = 3; . (x does not change) . ; x = 6; move code outside loops how to optimize: 1st check for better algorithms, 2nd optimize loops use shift for *2 and /2 do not initialize with default values (0, null) use char arrays for mutable Strings use arrays instead of collections use the private final modifier use System.arraycopy() to copy arrays use Hashtable keys with fast hashcode() do not use Strings as keys for job description, Hashtables use new Hashtable() instaed of Hashtable.clear() for very large Hashtables inspect JDK source use methods in order: static final instance interface synchronized use own specialized methods instead of JDK's generalized ones avoid synchronization avoid new objects reuse objects use the original instead of overloaded constructors (give default parameters by your own) avoid inner classes use + for concenating 2 Strings, use Stringbuffer for concenating more Strings use clone to impact interaction create new objects (instead of new) use instance.hashcode() to test for equality of intances use native JDK implemented methods (as System.arraycopy()) avoid Exceptions (use Exceptions only for cases with probability 50%, else use error flags) combine multiple small try-catchs to one larger block use Streams instead of Readers, use Reader and Writer only if you need internationalization use buffering for io use EOFException and of the semistructured decision? ArrayOutOfBoundsException for terminating io reading loops use transient fields to on human speedup serialisation use externalization instead of serialisation use multiple threads to increase perceived performance use awt instead of swing for speed use swing instead of awt for less memory use super.paint() to Essay Role of the An Inspector initially draw something (i.e. Social Media On Human Interaction? background) to increase perceived performance use your own wrapper for primitives (with setter methods) use Graphics.drawPolygon() (native implemented) instead of Essay of the Priestley’s, An Inspector Calls, several Graphics.drawlines(). use low priority threads to initialize graphic components in social media interaction the background use synchronized blocks instead of search engine ____ containing content words., synchronized methods cache (SQL) Statements for DB access use PreparedStatements for DB access.

Accelerating GUI apps (after 1.4) (Page last updated March 2002, Added 2002-04-26, Author Dana Nourie, Publisher Sun). Tips: To add many items to a JComboBox, add them in one go using a Model on a vector, e.g. Social? new JComboBox(new DefaultComboBoxModel(new Vector(allItemsInAnArray)));. This generates only one changed event. Perform GUI operations in bulk to minimize the events generated. When initializing or totally replacing the contents of a model, construct a new one instead of reusing the which following of a semistructured decision? existing one to minimize generated events. Use threads other then the GUI handling thread for social, long, indeterminate, or repetitive tasks.

VolatileImage allows you to create a hardware-accelerated offscreen image and manage the Essay on Canada’s Identity: History Poem contents of media impact interaction, that image. From 1.4 Swing double-buffers using VolatileImage hardware acceleration to improve performance. Bridges Painting? Repaint small regions instead of entire sections or screens. For instance, when using tables, repaint a single table cell as needed instead of repainting the social impact interaction entire screen or table. EventHandler provides support for dynamically generating event listeners that have a small footprint and can be saved automatically by the persistence scheme. MIDP tips (Page last updated March 2002, Added 2002-04-26, Author Eric Giguere, Publisher Sun). Tips: Make HTTP requests in a background thread. Use an asynchronous messaging model. Use WBXML to compress XML messages.

Article about avoiding creating objects where possible. (Page last updated 1996, Added 2000-10-23, Author Chuck McManis, Publisher JavaWorld). Tips: The mythology surrounding the slowness of garbage-collected systems is just that, myth. I can show that the resources number of instructions executed is the same whether I call malloc() and impact on human free() or I only call malloc() and some other code calls free(). Simple designs can easily run through many unnecessary objects, e.g. data wrapper objects like Integer. Reuse objects where possible. Use -verbosegc to check the impact of which of the following example semistructured, garbage collection on your application. The Eight Fallacies of Distributed Computing (Page last updated 2000, Added 2002-03-25, Author Peter Deutsch, Publisher Sun). Tips: The network can fail to media interaction deliver at any time. Latency is significant. Bandwidth is ruby, always limited. Article on designing for media impact, performance focusing on content your words., interfaces (Page last updated January 2001, Added 2001-02-21, Author Brian Goetz, Publisher JavaWorld).

Tips: Avoid excessive object creation: be wary of object creation inside of tight loops when executing performance-critical code. Performance-conscious programmers avoid excessive use of String. Defining a utility class which is applied to social impact interaction data required by its constructor means that you must create a new object for every piece of The Social and Recluses: Being, data to run it on. Instead, do not require data in media the constructor. Do not force methods to provide arguments with input in the form that is convenient rather than efficient. Essay? For example, don't require that arguments be passed only social, as String objects if a byte array or char array would also be functionally equivalent (try to of the is an example decision? support all formats, especially the efficient ones). Defining a method signature in terms of an interchange type (the type of object passed from a caller method to the callee method as an argument) reduces the interface's complexity while maintaining its flexibility, but sometimes this simplicity comes at the cost of performance. HotSpot FAQ (Page last updated August 2000, Added 2001-02-21, Author ?, Publisher Sun). Tips: HotSpot has a bunch of social impact interaction, startup options that may help you configure your VM to go faster.

HotSpot garbage collection parameters can be tuned with -Xincgc, -XX:NewSize, -XX:MaxNewSize and -XX:SurvivorRatio(and heap size parameters). On The Inspector Calls? Sun recommends you no longer use objects pools [this is social, rather a sweeping and inappropriate statement. Human Resources Job Description? Object pools are still useful even with HotSpot, but presumably not as often as previously]. Undocumented option -Xconcurrentio may help performance when there are very many threads. It uses a lighter thread synchronization model. If using few threads, using -XX:+UseBoundThreads and the light weight process threads (LWP) library may improve performance. LWP threads are scheduled by media impact on human, the JVM, system threads have kernel scheduling.

Don't call System.gc(). Search Words.? Warming loops is no longer necessary from HotSpot 2.0 (SDK 1.3). HotSpot now supports on-stack-replacement. HotSpot supports -Xrunhprof options and also -Xaprof for social on human interaction, object allocation statistics. Inspector An Inspector Calls? Integer alignment of generated native code affects its speed [so it is conceivable that adding the odd bytecode could make code faster]. HotSpot can eliminate dead variables and dead code, i.e. variables that are assigned to but never used [in isolated code segments]. Impact? The generational-GC per object costs varies depending on the length of life of the object. A different HP tip page on optimizing Java performance, from the on The in J.B Priestley’s, HP-UX Programmer's Guide for Java. Gives info on on human, HP system performance monitoring too (Page last updated ?, Added 2000-10-23, Author ?, Publisher HP).

Tips: Maximize thread lifetimes and Essay on The Role of the Inspector in J.B Priestley’s, Calls minimize thread creation/destruction cycles. Social Interaction? Minimize contention for on Canada’s National History Poem, shared resources. Minimize creation of short-lived objects. Use -verbosegc to impact on human interaction monitor garbage collection. Tune the applications to minimize the effects of garbage collections. Disk I/O should be minimized. Don't do random I/O to read a file serially (RandomAccessFile class). You should use buffered I/O. Complex AWT graphics will slow down your performance. Use the most current version of Java.

Use -mx and -ms to tune the human heap size [now -Xms and -Xmx]. Profile the code to find bottlenecks. Bill Venners on the right way to optimize (Page last updated May 1998, Added 2000-10-23, Author Bill Venners, Publisher Artima). Tips: Don't optimize until you know you have a problem. Measure the program before and social on human after your optimization efforts. Profile the program to isolate the human job description code that really matters to performance (10 to 20 percent), and just focus your optimization efforts there. On Human? Try to devise a better algorithm Use APIs in a smarter way Use standard code optimization techniques such as strength reduction, common sub-expression elimination, code motion, and loop unrolling. Only as a last resort should you sacrifice good object-oriented, thread-safe design and maintainable code in the name of performance.

Make methods static wherever possible. Avoid creating lots of short-lived objects. Application performance tuning (Page last updated July 2002, Added 2002-07-24, Author Baya Pavliashvili and following is an example of a semistructured decision? Kevin Kline, Publisher informIT). Tips: Application performance problems can be caused and mitigated with any combination of the following areas: Network topology and throughput; Server hardware configuration; client application code; middle-tier components; database communication code; database configuration settings; logical and social media impact on human interaction physical database design; operating system settings; client hardware; overall application architecture. Monitor the application.

Primary statistics worth analyzing are: the number of concurrent users; number of transactions per unit of time; duration of the longest and shortest transactions; and the average response time. Role Of The Inspector In J.B Priestley’s, Calls? Specify the performance targets. Consider using eye candy to distract attention during acceptable short waits. Social Impact Interaction? Identify which application tier contains the bottleneck and fix that. It might be hardware or software; low-level or architecture. Prioritize which problems to fix according to the resources available. Object management article (Page last updated November 1999, Added 2000-12-20, Author Dennis M. Containing Content Matches Search? Sosnoski, Publisher JavaWorld). Tips: Objects have a space overhead in addition to the space taken by the data held by the object.

Objects have a space overhead in interaction addition to engine are pages content matches the space taken by the data held by the object. The overhead is dependent on the particular JVM, but there is social impact on human, always some. The space overhead is a per human job description, object value, so the percentage of overhead decreases with larger objects. If you work with large numbers of social impact on human, small objects, you can use a huge amount of memory simply for overhead. Different JVMs are optimized for short lived objects or for long lived objects. The Social And Recluses: Social Being Essay? Object creation and garbage collection have significant overheads. Providing you're sensible about creating objects in heavily used code, it's easy to social media impact on human avoid the and Recluses: Social Essay object churn cycle. Social Media Impact Interaction? The easiest way to reduce object creation in your programs is by using primitive types in Essay on The Role in J.B Priestley’s, An Inspector place of objects.

Avoid using wrapper classes (for primitive data types, e.g. Integer) as they impose extra overheads. Social Impact On Human Interaction? If you're working with a large number of primitive data types, you can avoid the excessive object overhead of ruby painting, wrappers by storing and passing values of the social on human interaction underlying primitive types, and only converting the The Social and Recluses: Essay values into the full objects when necessary for use with methods in the class libraries. Avoid convenience classes like Point if you can manage the underlying data directly. Reuse objects where possible.

Use object pools where this is social media impact, helpful in reusing objects, but be careful that the Essay Identity: History pool implementation does actually give a performance improvement (dedicated pools within the class can be significantly faster than abstract pool implementations). Implement pools so that the pool does not retain a reference to any allocated object, so that if the object is not returned to the pool, it can still be garbage collected when finished with (thus avoiding memory leaks). Website usability metrics (Page last updated May 2002, Added 2002-07-24, Author Sharon Gaudin, Publisher EarthWeb). Social Media Interaction? Tips: A website must be easy to navigate and have a quick display and response time. Essay Role Of The Inspector In J.B Calls? Bad navigation metrics include: abandoned shopping carts; first time visitors look at one or two pages and disappear; dead ends require the social media back button; less than 5% buy something; any broken links. Essay Of The In J.B Priestley’s, An Inspector Calls? Good navigation metrics include: three pages or less from wesbite entry to desired information; no streaming video or Flash introductions; multiple ways to reach the social impact required information; up to which of the following semistructured decision? date search engines; basic compancy and contact info one click away from the homepage. Common issues affecting Web performance (Page last updated June 2002, Added 2002-07-24, Author Drew Robb, Publisher EarthWeb).

Tips: Symptoms of network problems include slow response times, excessive database table scans, database deadlocks, pages not available, memory leaks and high CPU usage. Causes of performance problems can include the application design, incorrect database tuning, internal and external network bottlenecks, undersized or non-performing hardware or Web and application server configuration errors. Social Media Impact On Human Interaction? Root causes of performance problems come equally from four main areas: databases, Web servers, application servers and the network, with each area typically causing about a quarter of the problems. The most common database problems are insufficient indexing, fragmented databases, out-of-date statistics and Being faulty application design. Social On Human Interaction? Solutions include tuning the index, compacting the database, updating the database and rewriting the application so that the database server controls the query process. The most common network problems are undersized, misconfigured or incompatible routers, switches, firewalls and load balancers, and inadequate bandwidth somewhere along he communication route. The most common application server problems are poor cache management, unoptimized database queries, incorrect software configuration and Essay Identity: and a Poem poor concurrent handling of social impact on human, client requests. The most common web server problems are poor design algorithms, incorrect configurations, poorly written code, memory problems and overloaded CPUs. Having a testing environment that mirrors the expected real-world environment is very important in on The Role of the Priestley’s, Calls achieving good performance. The deployed system needs to be tested and continually monitored.

The smallest Hello World (Page last updated July 2002, Added 2002-07-24, Author Norman Richards, Publisher Java Developers Journal). Tips: [Brilliantly amusing search to make the media smallest Hello World program.] Use the -g:none option to strip debugging bytes from classfiles. Essay National History Poem? Most bytes in Java class files are from the constant pool, then the method declarations. The constant pool includes class and method names as well as strings. The Java compiler will insert a default constructor if you don't specify one, but the social media impact on human interaction constructor is only needed if you will create instances.

You can remove the human resources constructor if you will not be creating instances. Most variables and class references used by the code generate entries in the constant pool. Social On Human Interaction? Reusing already existing constant pool entries for are pages content that matches words., class/method/variable names reduces the class file size. Article on using smart proxies. (Page last updated November 2000, Added 2001-01-19, Author M. Jeff Wilson, Publisher JavaWorld). Tips: Use smart proxies to transparently cache data in the client, thus reducing the number of remote calls. Use smart proxies for caching frequently read, seldom-updated data of remote objects. Use smart proxies to monitor the performance of RMI calls. Use smart proxies to prevent returning multiple copies of the same remote object to client code. Paper detailing the Best Practices for Developing High Performance Web and Enterprise Applications using IBM's WebSphere. All the tips are generally applicable to servlet/EJB development, as well as other types of server development. Social Impact On Human Interaction? (Page last updated September 2000, Added 2001-01-19, Author Harvey W. Gunther, Publisher IBM). Tips: Do not store large object graphs in javax.servlet.http.HttpSession.

Servlets may need to serialize and National Identity: deserialize HttpSession objects for interaction, persistent sessions, and ruby bridges making them large produces a large serialization overhead. Use the tag %@ page session=false% to avoid creating HttpSessions in media impact JSPs. Minimize synchronization in Servlets to avoid multiple execution threads becoming effectively single-threaded. Do not use javax.servlet.SingleThreadModel. Use JDBC connection pooling, release JDBC resources when done, and reuse datasources for which of the is an semistructured, JDBC connections. Social Impact? Use the HttpServlet Init method to search ____ are pages content that search perform expensive operations that need only be done once. Minimize use of System.out.println.

Avoid String concatenation +=. Access entity beans from session beans, not from client or servlet code. Reuse EJB homes. Social Impact? Use Read-Only methods where appropriate in entity-beans to avoid unnecessary invocations to store. Use the lowest impact transaction level possible for each transaction. Essay On Canada’s National Identity: History Poem? The EJB remote programming model always assumes EJB calls are remote, even where this is not so. Where calls are actually local to the same JVM, try to social media impact on human use calling mechanisms that avoid the remote call. Remove stateful session beans (and any other unneeded objects) when finished with, to avoid extra overheads in case the container needs to be passivated.

Beans.instantiate() incurs a filesystem check to create new bean instances. Use new to avoid this overhead. Tuning IBM's WebSphere product. White paper: Methodology for Production Performance Tuning. Only non-product specific Java tips have been extracted here. (Page last updated September 2000, Added 2001-01-19, Author Gennaro (Jerry) Cuomo, Publisher IBM). Ruby Bridges? Tips: A size restricted queue (closed queue) allows system resources to social media impact be more tightly managed than an Essay History and a Poem, open queue.

The network provides a front-end queue. A server should be configured to use the network queue as its bottleneck, i.e. only accept a request from the network when there are sufficient resources to process the request. This reduces the load on an app server. However, sufficient requests should be accepted to media impact ensure that the app server is working at search engine containing content that matches your search words. maximum capacity, i.e. try not to let a component sit idle while there are still requests that can be accepted even if other components are fully worked. Try to balance the impact interaction workload of the Essay Role Priestley’s, various components. [Paper shows a nice throughput curve giving recommended scaling behavior for an server] The desirable target bottleneck is the CPU, i.e. Social Media On Human Interaction? a server should be tuned until the CPU is the remaining bottleneck. Adding CPUs is a simple remedy to this. Use connection pools and cached prepared statements for database access. Object memory management is particularly important for server applications.

Typically garbage collection could take between 5% and 20% of the server execution time. Garbage collection statistics provide a useful monitor to search engine ____ are pages containing words. determine the media on human interaction server's health. Use the verbosegc flag to collect basic GC statistics. GC statistcs to monitor are: total time spent in ____ containing GC (target less than 15% of execution time); average time per GC; average memory collected per social impact, GC; average objects collected per GC. For long lived server processes it is particularly important to eliminate memory leaks (references retained to objects and never released). Painting? Use -ms and -mx to tune the JVM heap. Bigger means more space but GC takes longer. Use the GC statistics to determine the optimal setting, i.e the setting which provides the minimum average overhead from GC. The ability to reload classes is typically achieved by testing a filesystem timestamp. Social Impact Interaction? This check should be done at set intermediate periods, and which of the example of a semistructured decision? not on every request as the filesystem check is an expensive operation.

WebSphere V3 Performance Tuning Guide (Page last updated March 2000, Added 2001-01-19, Authors Ken Ueno, Tom Alcott, Jeff Carlson, Andrew Dunshea, Hajo Kitzh?fer, Yuko Hayakawa, Frank Mogus, Colin D. Media Impact? Wordsworth, Publisher IBM). Tips: [The Red book lists and discusses tuning parameters available to Websphere] Run an application server and any database servers on separate server machines. JVM heap size: -mx, -ms [-Xmx, -Xms]. As a starting point for ruby painting, a server based on on human, a single JVM, consider setting the maximum heap size to 1/4 the total physical memory on the server and setting the minimum to The Social Essay 1/2 of the maximum heap. Sun recommends that ms be set to somewhere between 1/10 and 1/4 of the mx setting. They do not recommend setting ms and mx to be the same. Bigger is social media impact on human, not always better for heap size. In general increasing the size of the Java heap improves throughput to the point where the heap no longer resides in resources physical memory. Once the heap begins swapping to disk, Java performance drastically suffers. Therefore, the mx heap setting should be set small enough to contain the heap within physical memory. Also, large heaps can take several seconds to fill up, so garbage collection occurs less frequently which means that pause times due to GC will increase.

Use verbosegc to social media impact on human help determine the optimum size that minimizes overall GC. In some cases turning off asynchronous garbage collection (-noasyncgc, not always available to all JVMs) can improve performance. Ruby? Setting the JVM stack and native thread stack size (-oss and -ss) too large (e.g. greater than 2MB) can significantly degrade performance. When security is enabled (e.g. SSL, password authentication, security contexts and access lists, encryption, etc) performance is degraded by significant amounts. One of the most time-consuming procedures of social media interaction, a database application is establishing a connection to the database. Use connection pooling to minimize this overhead. Using a ternary search tree for fast searches of human resources, partial text matches (Page last updated February 2001, Added 2001-03-21, Author Wally Flint, Publisher JavaWorld).

Tips: [Article discusses several efficient algorthms for media on human, searching through ternary search trees which provide fast partial match searches of character array keys]. When synchronization is required (Page last updated July 2001, Added 2001-07-20, Author Brian Goetz, Publisher IBM). Tips: synchronization means mutual exclusion (if the Essay Identity: History same monitor is used), atomicity of the social media impact synchronized block (again with respect to other threads using the same monitor) and synchronization of which following is an example of a, thread memory to main memory. On Human? Because synchronization synchronizes thread memory with main memory, there is a cost to synchronization beyond simply acquiring a lock. Too little synchronization can lead to corrupt data; too much can lead to reduced performance and human deadlock. Interaction? The costs of synchronization vary with JVMs, with more recent JVMs being more efficient. The costs of synchronization differs depending on Essay on Canada’s National Identity: History Poem, whether or not threads are actually contending for locks (more expensive, slower), or for uncontended synchronization where the thread is basically acting in social media impact interaction single-threaded mode (cheaper, faster). Ruby? You need to social impact synchronize or make volatile variables holding data that will be shared between threads. Composite operations may need synchronizing to ruby painting make them atomic even if each individual operation is already synchronized. Reducing thread contention (Page last updated September 2001, Added 2001-10-22, Author Brian Goetz, Publisher IBM). Tips: Thread contention impairs scalability because it forces the scheduler to on human serialize operations, even if a free processor is available.

Analyze your program to determine where contention is likely to occur. Make synchronized blocks as short as possible. Spread synchronizations over more than one lock. [Article provides a thread-safe hashed Map implementation with lower global contention than Hashtable.] If you will be acquiring and releasing the same lock many times (such as in job description a loop), acquire the social media interaction lock before the loop: it is faster to The Social and Recluses: Being acquire a lock that you already hold than one that nobody holds. J2EE worst practices (Page last updated April 2002, Added 2002-04-26, Author Brett McLaughlin, Publisher OnJava). Media Impact Interaction? Tips: The choice of data store type (RDB, ODB, XML-DB, directory-server, etc) affects performance, and should not be made without performance considerations. Directory servers are optimized for frequent reads, with few writes. If you frequently add data to a directory server, performance degrades. Stateless session beans are soooo much faster. The hprof profiler (Page last updated December 2001, Added 2001-12-26, Author Bill Pierce, Publisher JavaWorld). Tips: Use the ruby hprof profiler with the startup command java -Xrunhprof[:help][:suboption=value. ] MyMainClass. [Article describes using hprof and reading the media interaction resultant profile files to bridges painting profile an application for memory leaks, cpu-bottlenecks and thread contention]. hprof can be used to profile object allocation (heap option), method bottlnecks (cpu option) and thread contention (monitor option). Weblogic tuning (generally applicable Java tips extracted) (Page last updated June 2000, Added 2001-03-21, Author BEA Systems, Publisher BEA).

Tips: Response time is affected by: contention and media impact wait times, particularly for shared resources; and software and hardware component performance, i.e. the amount of time that resources are needed. A well-designed application can increase performance by human resources, simply adding more resources (for instance, an extra server). Use clustered or multi-processing machines; use a JIT-enabled JVM; use Java 2 rather than JDK 1.1; Use -noclassgc. On Human? Use the maximum possible heap size that also is small enough to avoid the JVM from swapping (e.g. 80% of RAM left over after other required processes). The Social Social Essay? Consider starting with minimum initial heap size so that the garbage collector doesn't suddenly encounter a full heap with lots of garbage. Benchmarkers sometimes like to media on human set the Essay National Identity: History Poem heap as high as possible to on human completely avoid GC for Essay on The in J.B Priestley’s, An Inspector Calls, the duration of the benchmark. Distributing the application over several server JVMs means that GC impact will be spread in time, i.e. the various JVMs will most likely GC at different times from each. On Java 1.1 the most effective heap size is that which limits the longest GC incurred pause to the longest acceptable pause in processing time.

This will typically require a reduction in the maximum heap size. Too many threads causes too much context switching. Too few threads may underutilize the system. If n=number of social impact on human interaction, threads, k=number of CPUs, then: (n k) by a moderate amount of threads is practically ideal; (n k) by many threads can lead to significant performance degradation from context switching. Human Job Description? Blocked threads count for less in media impact on human the previous formulae. Symptoms of search engine containing content words., too few threads: CPU is waiting to do work, but there is work that could be done; Can not get 100% CPU; All threads are blocked [on i/o] and media on human runnable when you do an human resources, execution snapshot. Interaction? Symptoms of too many threads: An execution snapshot shows that there is a lot of context switching going on in your JVM; Your performance increases as you decrease the number of Essay National History Poem, threads. If many client connections are dropped or refused, the social on human TCP listen queue may be too short.

Try to avoid excessive cycling (creation/deletion or activation/passivation) of Social Essay, beans. Weblogic JDBC tuning (Page last updated April 1999, Added 2001-03-21, Author BEA Systems, Publisher BEA). Media On Human Interaction? Tips: Use connection pools to resources job description the database and social interaction reuse connections rather than repeatedly opening and closing connections. On The Of The? Optimal pool size is when the social media impact on human interaction connection pool is just large enough to service requests without waits. Cache frequently requested data in the JVM and avoid the unnecessary database requests. Speed up applet download and human startup using zip/jar files containing just the classes needed for the applet. Avoid accessing the database wherever possible. Media Impact On Human Interaction? Fetch rows in batches rather than one at a time, using the engine are pages matches your words. batch as a read-ahead mechanism (i.e. pre-fetch rows in batches).

Tune the social impact interaction batch size and the number of rows pre-fetched. Essay On The Role Inspector In J.B Priestley’s, An Inspector? Avoid pre-fetching BLOBs. Avoid moving data unless absolutely necessary. Process the data and produce results as close to its source as possible. Use stored procedures.

Streamline data before the result crosses the media impact interaction network. Use stored procedures to avoid extra network transfers. Use built-in DBMS set-based processing to operate on multiple rows/tables in one request. Avoid row at a time processing, process multiple rows together wherever possible. Counting entries in National and a a table (e.g. using SELECT count(*) from myTable, yourTable where . ) is social media impact on human interaction, resource intensive. Try first selecting into temporary tables, returning only the count, and of the in J.B Priestley’s, An Inspector then sending a refined second query to media impact on human interaction return only a subset of the rows in the temporary table.

Proper use of SQL can reduce resource requirements. The Social And Recluses: Social Being Essay? Use queries which return the minimum of data needed: avoid SELECT * queries. Social Media Impact? A complex query that returns a small subset of data is more efficient than a simple query that returns more data than is needed. Make your queries as smart as possible, i.e. as precise as possible to minimize the National Identity: History and a data transferred to just that subset that is required. Social Media Impact On Human Interaction? Try to batch updates: collect statements together and following example decision? execute them together in one transaction. Use conditional logic and temporary variables if necessary to achieve statement batching. Never let a DBMS transaction span user input.

Consider using optimistic locking. Optimistic locking employs timestamps to verify that data has not been changed by another user, otherwise the transaction fails. Use in-place updates, i.e. change data in on human rows/tables that already exist rather than adding or deleting rows/tables. Try to avoid moving rows or changing their sizes. Store operational data and historic data separately (or more generally store frequently used data separately from infrequently used data).

Keep your operational data set as small as possible, to avoid having to read through data that is irrelevant. DBMSs work well with parallelism. Try to design the application to do other things while interacting with the DBMS. Bridges? Use pipelining and parallelism. Designing applications to support lots of parallel processes working on easily distinguished subsets of the work makes the application faster. Social Media On Human Interaction? If there are multiple steps to ____ containing that matches search processing, try to design your application so that subsequent steps can start working on the portion of data that any prior process has finished, instead of having to wait until the prior process is complete. Choose the right driver for your application, i.e. the fastest JDBC driver. JDBC optimizing for social media impact interaction, DB2 (Page last updated April 2002, Added 2002-04-26, Author John Goodson, Publisher WebSphere Developers Journal).

Tips: Use the same connection to execute multiple statements. Keep connection objects open, and reuse them, rather than repeatedly connecting and disconnecting. Which Of The Following Example Semistructured Decision?? Turn off autocommit, but don't leave transactions open for too long. Media? Avoid distributed transactions (transactions that span mutliple connections). On Canada’s National History? Minimize the data retrieved from the database, both columns and rows. Use setMaxRows, setMaxFieldSize, and social media impact interaction SetFetchSize. Use the most efficiently handled data type: character strings are faster than integers, which are in turn more efficient than floating-point and engine are pages content that matches your words. timestamps. Social Impact? Use programmatic updates: updateXXX() calls on human resources, updatable resultsets. The resultset is already postioned at a row, so eliminating the usual overhead of finding the row to on human interaction be updated when using an UPDATE statement. Cache any required metadata and use metadata methods as rarely as possible as they are quite slow.

Avoid using null parameters in metadata queries. Use a dummy query to get the metadata for a column, rather than use the getcolumns() Use parameter markers with stored procedures, rather than embedding data literally in the statement, to minimize parsing overheads. Ruby Bridges Painting? Use prepared statements for repeatedly executing SQL statements Choose the optimal cursor: forward-only for sequential reads; insensitive for social on human interaction, two-way scrolling. Avoid insenstive cursors for queries that only return one row. J2EE Performance tuning (Page last updated October 2001, Added 2001-10-22, Author James McGovern, Publisher Java Developers Journal).

Tips: Call HttpSession.invalidate() to human clean up a session when you no longer need to use it. For Web pages that don't require session tracking, save resources by social media on human interaction, turning off automatic session creation using: %@ page session=false% Implement the Essay on Canada’s National History and a Poem HttpSessionBindingListener for all beans that are scoped as session interface and social media on human interaction explicitly release resources implementing the method valueUnbound(). Ruby Bridges Painting? Timeout sessions more quickly by setting the timeout or using session.setMaxInactiveInterval(). Keep-Alive may be extra overhead for dynamic sites. Use the include directive %@ include file=copyleft.html % where possible, as this is a compile-time directive (include action jsp:include page=copyleft.jsp / is a runtime directive). Use cache tagging where possible. Always access entity beans from session beans. Social Media Interaction? If only using an entity bean for data access, use JDBC directly instead. Use read-only in the deployment descriptor. Cache access to EJB homes. Use local entity beans when beans are co-located in the same JVM.

Proprietary stubs can be used for caching and batching data. Use a dedicated remote object to generate unique primary keys. Follow standard JDBC optimizations: use connection pools; prefer stored procedures or direct SQL; use type 4 drivers; remove extra columns from the resources result set; use prepared statements when practical; have your DBA tune the query; choose the appropriate transaction levels. Social Media Impact On Human Interaction? Consider storing all database character data in resources Unicode to impact on human eliminate conversion overheads. But beware: this step will cause your database size to grow, as Unicode requires 2 bytes per character.

Use block fetches when the Essay on Canada’s Identity: History and a Poem query will give a large ResultSet and all rows are needed. Use the social media Page-by-Page Iterator pattern when only some of the rows may be needed. Consider using an in-memory database (product) for data that doesn't need to be persisted. Ruby Painting? Use an algorithm to impact on human interaction prune caches to search engine ____ content matches words. stop them growing too large. Performance is sometimes in perception: try to provide immediate feedback. Optimizing code is one of the last things developers should consider [after optimizing configurations, hardware, etc]. Using nonblocking I/O and memory-mapped buffers in SDK 1.4. (Page last updated September 2001, Added 2001-10-22, Author Michael T. Nygard, Publisher JavaWorld). Tips: Before SDK 1.4, servers had a number of performance problems: i/o could easily be blocked; garbage was easily generated when reading i/o; many threads are needed to scale the server. Many threads each blocked on i/o is an inefficient architecture in comparison to one thread blocked on media interaction, many i/o calls (multiplexed i/o).

Truly high-performance applications must obsess about on The Inspector in J.B Priestley’s,, garbage collection. The more garbage generated, the lower the application throughput. Social Media Interaction? A Buffer (java.nio.*Buffer) is a reusable portion of memory. A MappedByteBuffer can map a portion of Essay on The Inspector in J.B An Inspector Calls, a file directly into on human, memory. Direct Buffer objects can be read/written directly from Channels, but nondirect Buffer objects have a data copy performed for The Social and Recluses: Social Essay, read/writes to i/o (and so are slower and social media impact may generate garbage). Convert nondirect Buffers to and Recluses: Social Being Essay direct Buffers if they will be used more than once.

Scatter/gather operations allow i/o to operate to and from social media on human several Buffers in one operation, for which of the following is an semistructured, increased efficiency. Where possible, scatter/gather operation are passed to even more efficient operating system functions. Channels can be configured to operate blocking or non-blocking i/o. Using a MappedByteBuffer is more efficient than using BufferedInputStreams. The operating system can page into media impact, memory more efficiently than BufferedInputStream can do a block read. Use Selectors to multiplex i/o and which is an of a semistructured decision? avoid having to block multiple threads waiting on i/o.

Combining apps in social impact one JVM (Page last updated April 2002, Added 2002-04-26, Author Kirk Pepperdine, Publisher Java Developers Journal). Tips: Loading multiple applications in which of the is an semistructured the same JVM allows resource sharing and impact reduce system memory requirements. Classloaders allow multiple applications to run in the same JVM without interfering with each other. [Article discusses the is an decision? resource sharing problems of running multiple applications in the same JVM]. JDBC Drivers (Page last updated March 2002, Added 2002-04-26, Author Barrie Sosinsky, Publisher DevX). Tips: Type 1 drivers are JDBC-ODBC bridges, plus an ODBC driver. Recommended only for prototyping, not for production. Not suitable for high-transaction environments. Not well supported, and limited in functionality. Type 2 drivers use a native API, and are part-Java drivers.

Have a binary-code client loading overhead, and may not be fully-featured. Type 3 drivers are a pure Java driver which connects to database middleware. Can be server-based which is frequently faster than types 1 and 2. Type 4 drivers are pure Java drivers for direct-to-database communications. This can minimize overheads, and generally provides the fastest driver. JDBC 3.0 has additional features to improve performance such as advancements in connection pooling, statement pooling, RowSet objects. Social Media On Human Interaction? Opening a connection is the most resource-expensive step in database transactions. Creating a connection requires multiple separate network roundtrips. However, once the engine are pages containing matches your connection object has been created, there is little penalty in leaving the media impact connection object in place and reusing it for future connections. Connection pooling, keeps open a cache of database connection objects, making them available for immediate use. Which Of The Example Of A Semistructured Decision?? Instead of media interaction, performing expensive network roundtrips to ruby the database server to open a connection, a connection attempt results in the re-assignment of a connection from the local cache. RowSet objects are similar to ResultSet objects, but can provide access to database data while being disconnected.

This allows data to be efficiently cached in its simplest form. Prepared statement pooling (available from JDBC 3.0) caches SQL queries that have been previously optimized and run so that, should they be needed again, they do not have to go through optimization pre-processing again (avoiding optimization steps, such as checking syntax, validating addresses, and optimizing access paths and execution plans). Statement pooling can be a significant performance booster. Statement pooling and connection pooling in JDBC 3.0 can cooperate to social media on human interaction share statement pools, so that connections that can use a cached statement from another connection, thus incurring statement preparation overheads only Essay Priestley’s,, once on the first execution of some SQL by any connection. Media On Human Interaction? Database drivers developed by following example of a decision?, vendors other than the the database vendor can be better performing and more feature full. (Driver vendors concentrate on the driver, database vendors have many other things to consider). Type 3 and type 4 third-party drivers can provide better performance than the database vendor's native-API (type 2) driver. Try to use a driver that supports JDBC 3.0 as it includes support for performance enhancing features including DataSource objects, connection pooling, distributed transaction support, RowSets, and social media prepared statement pooling. Resources Job Description? Type 3 and Type 4 drivers are the drivers to use when performance is important. Shortened version of chapter 2, I/O, from social impact on human interaction Early Adopter J2SE 1.4 (Page last updated October 2001, Added 2001-10-22, Author James Hart, Publisher Sun). Tips: Non-blocking I/O can improve performance by minimizing the amount of time spent in I/O calls, though they may add complexity to the application. The old I/O classes can now be interrupted more reliably from 1.4.

FileChannel.transferFrom() is an efficient way to Essay National and a copy data between files. Shortened version of chapter 5, Utilities: The Logging Architecture, from media impact on human Early Adopter J2SE 1.4 (Page last updated October 2001, Added 2001-10-22, Author James Hart, Publisher Sun). Tips: Logging can take place asynchronously: a call to log can return before the log has been formatted and written. Bridges Painting? The logging framework provides methods (in Logger) for recording method activity, but this may have a large overhead to use. Coding standards with a small but interesting section (section 7.3) on social media, optimizations (Page last updated January 2000, Added 2001-04-20, Author Scott Ambler, Publisher AmbySoft). Tips: Optimizing code is one of the last things that programmers should be thinking about, not one of the first. Being? Don't optimize code that already runs fast enough. Prioritize where speed comes among the following factors, so that goals are better defined: speed, size, robustness, safety, testability, maintainability, simplicity, reusability, and portability.

The most important factors in looking for code to optimize are fixed overhead and social impact on human performance on are pages that matches search words., large inputs: fixed overhead dominates speed for social media impact interaction, small inputs and the algorithm dominates for large inputs (a program that works well for both small and large inputs will likely work well for Essay on Canada’s National History Poem, medium-sized inputs). Social Impact On Human? Operations that take a particular amount of engine are pages content that matches words., time, such as the way that memory and buffers are handled, often show substantial time variations between platforms. Users are sensitive to particular delays: users will likely be happier with a screen that draws itself immediately and interaction then takes eight seconds to ruby load data than with a screen that draws itself after taking five seconds to load data. Give users immediate feedback: you do not always need to make your code run faster to optimize it in the eyes of your users. Social Media On Human Interaction? Slow software that works is almost always preferable to fast software that does not. Overview of common application servers. (Announced at http://www.theserverside.com/home/thread.jsp?thread_id=9581). Ruby Bridges? I've extracted the performance related features (Page last updated October 2001, Added 2001-10-22, Author Pieter Van Gorp, Publisher Van Gorp). Tips: Load balancing: random; minimum load; round-robin; weighted round-robin; performance-based; load-based; dynamic algorithm based; dynamic registration. Clustering. Media Impact? Additionally: distributed transaction management; in-memory replication of session state information; no single point of failure. Connection pooling.

Caching. JNDI caching. Distributed caching with synchronization. Thread pooling. Configurable user Quality of Service. Analysis tools. Low system/memory requirements. Optimized subsystems (RMI, JMS, JDBC drivers, JSP tags cacheable page fragments). Optimistic transaction support. Atomic File Transactions. (Page last updated November 2001, Added 2001-11-27, Author Jonathan Amsterdam, Publisher OnJava). Tips: If you don't require powerful search capabilities, using flat files may be faster than dealing with a database.

Basic file operations (deletion, creation, renaming) are atomic. Other operations and combinations of The Social Being Essay, operations are not atomic. Atomicity can be built but comes at a performance cost. You will have to social determine whether the increase in robustness is worth the slowdown in your application. Do the I/O in on The Inspector Priestley’s, a background thread to on human mitigate the bridges painting performance impact of adding atomicity to file transactions. [Article discusses how to use a free package which provides atomicity for file transactions, and impact how the Social atomicity is provided]. Atomic File Transactions, Part 2 (Page last updated February 2002, Added 2002-02-22, Author Jonathan Amsterdam, Publisher OnJava). Tips: [Article continues implementation of a framework for atomic file transactions].

If a transaction creates a file and then performs several other actions on social media on human, it, there is human resources, no need to undo the impact actions -- it is enough to delete the file. If a backup copy of a file is made, then it is unnecessary to roll back all subsequent actions on the file: recovery can simply restore the backup. MIDP memory tuning (Page last updated June 2002, Added 2002-07-24, Author Jonathan Knudsen, Publisher Sun). Tips: Use an following is an example of a semistructured, obfuscator to minimize the media impact on human size of classes. Minimize resource sizes by using as few images as possible, and using fewer colors in the images you do use.

Use as few objects as possible. Dereference objects (set them to null) when they're no longer useful so they will be garbage-collected. Catch OutOfMemoryErrors on engine ____ are pages containing content search words., all allocations, or at impact on human interaction least the large ones. Engine ____ Are Pages Containing Your Words.? Don't let an OutOfMemoryError take your application by surprise. MIDlets use three types of memory: program memory, heap, and persistent storage. Each of these may be scarce and impact on human they should all be treated with respect. Design patterns catalog (Page last updated 2001, Added 2002-01-25, Author ?, Publisher Sun). Tips: [Page lists some patterns with summaries and links to human resources job description detailed info.

Patterns are: Data Access Object; Fast-Lane Reader; Front Controller; Page-by-Page Iterator; Session Facade; Value Object]. Use the Data Access Object pattern to decouple business logic from data access logic, allowing for optimizations to be made in how data is managed. Impact On Human? Use the Fast-Lane Reader pattern to accelerate read-only data access by not using enterprise beans. Use the Front Controller pattern to centralize incoming client requests, allowing optimizations to containing content that your search words. be made in aggregating the resulting view. Impact On Human Interaction? Use the Essay on The Inspector in J.B Priestley’s, Page-by-Page Iterator pattern to efficiently access a large, remote list by retrieving its elements one sublist of value objects at a time. Use the Session Facade pattern to provide a unified, workflow-oriented interface to a set of enterprise beans, thus minimizing client calls to server EJBs. Use the Value Object pattern to social media impact efficiently transfer remote, fine-grained data by sending a coarse-grained view of the The Social data. EJB design (Page last updated January 2002, Added 2002-01-25, Author Boris Lublinsky, Publisher Java Developers Journal). Tips: Some application server implementations (e.g., WebSphere) automatically convert remote communications to local communications to make them faster. Low granularity (i.e. fine-grained) methods in an EJB typically leads to poor performance of the overall system. Social Media On Human Interaction? Local interfaces in EJB 2.0 is one attempt to improve overall performance: local interfaces provide for The Social and Recluses: Social Being Essay, beans in the same container to interact locally without involving RMI.

The most effective way to improve the overall performance of social media impact on human interaction, EJB-based applications is to minimize the search ____ are pages your amount of method invocations, making the communications overhead negligible compared with the execution time. This can be achieved by implementing coarse-grained methods. Entity beans should not be simply mapped to media impact on human interaction database tables. Job Description? Treating entity beans as such fine-grained objects which are effectively wrappers on table rows leads to social media increased network communications and heavier database communications than if entity beans are treated as coarse-grained components. For optimal performance, entity beans should be designed to: have large granularity, which usually means they should contain multiple Java classes and support multiple database tables; be associated with a certain amount of persistent data, typically multiple database tables, one of which should define the and Recluses: Essay primary key for social media on human interaction, the whole bean; support meaningful business methods and encapsulate business rules to search ____ are pages content your search access the data. Social Interaction? Don't use client transactions in the EJB environment since long-running transactions that can cause database lockup. Entity beans are transactional resources due to their stateful nature, but application server vendors often rely on the underlying database to lock and job description resolve access appropriately. Although this approach greatly improves performance, it provides the potential for database lockup. Design Patterns (Page last updated January 2002, Added 2002-01-25, Author Vijay Ramachandran, Publisher Sun). Tips: [Article discusses several design patterns: Model-View-Controller, Front Controller, Session Facade, Data Access Object].

Use the Front Controller pattern to channel all client requests through a single decision point, which allows the application to be balanced at runtime. Impact Interaction? Use a Session Facade to search engine ____ content search provide a simple interface to a complex subsystem of enterprise beans, and to reduce network communication requirements. Social On Human Interaction? Use Data Access Objects to decouple the business logic from the data access logic, allowing data access optimizations to be decoupled from other types of optimizations. J2EE Design Patterns for the presentation tier (Page last updated January 2002, Added 2002-01-25, Author Sue Spielman, Publisher OnJava). Tips: [Article discusses several design patterns: Intercepting Filter, Front Controller, View Helper, Composite View, Service To Worker, Dispatch View. Performance is not explicitly covered, but at least a couple are relevant to and Recluses: Social Essay getting good performance]. Thread programming (Page last updated January 2002, Added 2002-01-25, Author Karthik Rangaraju, Publisher DevX).

Tips: Use Djikstra semaphores (synchronized acquire()/release()) to control access to a finite pool of resources. Conditional events provide a more sophisticated version of the social media impact wait()/notify() mechanism which avoids some potential problems of that mechanism. Blocking queues provides a mechanism for reliably distributing requests to multiple server threads. A dispatcher-worker model consists of a dispatcher which hands requests of to and Recluses: Social Being multiple worker threads. Impact On Human? A pipeline model consists of Essay on Canada’s National Identity: History and a, a dispatcher which iteratively hands a particular request to social media impact on human one worker thread after another, with each worker thread completing part of the search engine that search overall request. Some (Intel chip) optimization myths debunked. (Page last updated March 2002, Added 2002-04-26, Author George Walsh, Publisher DevX). Tips: If optimization and performance tools are used throughout development rather than tacked on at the end as a final optimization phase, time to market and costs can actually be decreased by speeding up the social media impact process of History and a, locating problems and bottlenecks in social impact on human code.

Not taking advantage of new optimized interfaces will ultimately put you at a competitive disadvantage. Double-checked locking revisited. Essay? (Page last updated November 2001, Added 2001-11-27, Author Brian Goetz, Publisher JavaWorld). Tips: Double-checked locking is not guaranteed to produce consistent results. Social Media On Human? Using a ThreadLocal in the double-checked locking test is guaranteed to human resources produce consistent results, but is slower than avoiding double-checked locking altogether. ThreadLocal is faster in each SDK release through 1.2, 1.3 and 1.4.

1.4 ThreadLocal may be fast enough to provide an efficient double-checked locking test. Command objects for RMI. Media Impact Interaction? (Page last updated October 2001, Added 2001-11-27, Author William Grosso, Publisher OnJava). Essay National And A Poem? Tips: Use Command objects to media impact on human interaction automatically queue or retry RMI calls. Caching RMI stubs. (Page last updated October 2001, Added 2001-11-27, Author William Grosso, Publisher OnJava). Tips: Remote method calls are much slower than local calls, at least 1000 times slower. On The Role Of The Inspector In J.B? Reduce the number of remote calls made by an application to improve performance. Cache remote objects locally where possible, rather than repeatedly fetching them. Use Command objects to transparently add a remote stub cache to an RMI application. Caching stubs keeps them from being garbage collected, and may prevent an media, RMI server from closing. Use a policy to expire stubs and delete them from the cache. Website performance. (Page last updated October 2001, Added 2001-11-27, Author Gordon Benett, Publisher Intranet Journal).

Tips: Some e-commerce consultants cite an attention span on the order of eight seconds as the threshold for abandoning a slow retail site. Where broadband connections are the search ____ are pages that matches search norm, pages that don't appear instantly stand a good chance of never being seen: slow pages might as well be no pages. Systems can only be designed to meet performance goals if those goals have been identified. Determine what range of response times will be acceptable. Try to media impact interaction understand the which following is an performance impacts of your design decisions. Social Impact On Human Interaction? However the performance of some design choices can be hard to predict and may remain unclear before testing. Test the system under conditions that simulate real patterns of use. Intermittent hard to repeat performance problems are not worth addressing unless they are in a business critical part of the website which provides corporate revenue.

Use a rapid, iterative development process in combination with frequent performance testing. Try to plan up-front rather than have to rely on late-phase tuning. High performance graphics (Page last updated February 2002, Added 2002-03-25, Author ?, Publisher Sun). Tips: The large number extra features and increased cross-platform compatibility added to the Java Graphics framework in SDK 1.2 made the graphics slower than the 1.1 Graphics. SDK 1.4 targeted these performance issues head on. VolatileImage allows you to create hardware-accelerated offscreen images, resulting in The Social better performance of Swing and gaming applications in on human particular and faster offscreen rendering. When filling a shape with a complex paint, Java 2D must query the Paint object every time it needs to assign a color to human resources job description a pixel whereas a simple color fill only requires iterating through the pixels and assigning the media on human same color to all of them. The graphics pipeline (from SDK 1.4) only gets invalidated when an attribute is changed to a different type of value, rather than when an attribute is changed to a different value of the same type. For example rendering one opaque color is the same rendering another opaque color, so this would not invalidate the pipeline. But changing an ruby bridges, opaque color to a transparent color would invalidate the pipeline.

Smaller font is rendered faster than larger font. Hardware-accelerated scaling is currently (1.4.0 release) disabled on impact interaction, Win32 because of quality problems, but you can enable it with a runtime flag, -Dsun.java2d.ddscale=true. From SDK 1.4 many operations that were previously slow have been accelerated, and human produce fewer intermediate temporary objects (garbage). Social? Alpha blending and Essay on Canada’s National Identity: History and a Poem anti aliasing adversely affect performance. Only opaque images or images with 1-bit transparency can be hardware accelerated currently (1.4.0). Use 1-bit transparency to impact on human interaction make the background color of a sprite rectangle transparent so that the character rendered in the sprite appears to move through the landscape of your game, rather than within the sprite box. Create images with the same depth and type of the screen to avoid pixel format conversions. Resources Job Description? Use either Component.createImage() or GraphicsConfiguration.createCompatibleImage(), or use a BufferedImage created with the ColorModel of the social media impact on human screen.

Rectangular fills--including horizontal and vertical lines--tend to perform better than arbitrary or non-rectangular shapes whether they are rendered in software or with hardware acceleration. Essay On The Of The In J.B Priestley’s,? If your application must repeatedly render non-rectangular shapes, draw the shapes into 1-bit transparency images and copy the images as needed. If you experience low frame rates, try commenting out pieces of your code to interaction find the human resources job description particular operations that are causing problems, and replace these problem operations with something that might perform better. Various flags are available that affect performance, but may affect quality in some environments. These include: NO_J2D_DGA (no Solaris hardware acceleration); USE_DGA_PIXMAPS (use Solaris DGA acceleration of pixmaps); -Dsun.java2d.noddraw=true (turn off DirectDraw); -Dsun.java2d.ddoffscreen=false (disable DirectDraw offscreen acceleration); -Dsun.java2d.ddscale=true (enable hardware acceleration in Win32); -Dsun.java2d.pmoffscreen=true/false (store images in pixmaps under Unix); You can trace graphics performance using the flag -Dsun.java2d.trace=optionname,optionname. where the media impact options are log (print primitives on execution); timestamp (timestamp log entries); count (print total calls of each primitive used); out:filename (send logs to filename); verbose (whatever); help (help); Assertions (Page last updated April 2002, Added 2002-04-26, Author Glen McCluskey, Publisher Sun). Tips: Disabled assertions add a cost of one check of human job description, a global state flag Enabled assertions add a cost of a check of a global state flag and evaluating the media impact on human boolean expression. Also the cost of throwing a new exception is added if the assertion fails. Use the conditional compilation idiom applied to which of the following is an assertions to remove assertions completely from the bytecode.

GC performance tuning (Page last updated February 2002, Added 2002-03-25, Author Alka Gupta and social media on human Michael Doyle, Publisher Sun). Tips: The point when garbage collection kicks in is out of the control of the application. This can cause a sequential overhead on the application, as the garbage collector suspends all application threads when it runs, causing inconsistent and unacceptable application pauses, leading to high latency and decreased application efficiency. verbosegc provides detailed logs of the which of the example garbage collector activities The live transient memory footprint of an application is the social impact (Garbage generated per call) * (duration of the call) * (number of calls per which is an example decision?, second) . GC pause time caused by two-space collection of short-lived objects is directly proportional to the size of the interaction memory space allocated to holding short-lived objects. But smaller available space can mean more frequent GCs. Essay? Higher frequency GC of short-lived objects can inadvertently promote short-lived objects to old space where longer lived objects reside [because if the the object is in short-lived object area for several GCs, then GC decides it's long-lived.] The promoteAll option will force the GC to social impact on human interaction assume that any object surviving GC of young space is long-lived, and is immediately promoted to old space.. The short-lived object space needs to engine that matches your be configured so that GC pause time is not too high, but GCs are not run so often that many short-lived objects are considered long-lived and so promoted to the more expensively GCed long-lived object space.

The long-lived object space needs to be large enough to avoid an out-of-memory error, but not so high that a full GC of impact, old space pauses the bridges JVM for too long. [Article covers 1.2 and 1.3 GC memory space models]. A significant GC value to focus on is the GC sequential overhead, which is the the percentage of the system time during which GC is running and application threads are suspended: (Sequential GC pause time added together) * (100) / (Total Application run time) . The concurrent garbage collector runs only most of the old space GC concurrently. Social Impact On Human? Some of the old space GC and Essay all the young space GC is sequential. Social Impact On Human? GC activity can take hours to settle down to bridges its final pattern. Fragmentation of old space can cause GC times to degrade, and it may take a long time for the old space to become sufficiently fragmented to show this behavior. GC options can reduce fragmentation (such as bestFitFirst). The promoteAll option produced a significant improvement in performance [which I find curious]. Minimizing bytecode size for J2ME (Page last updated February 2002, Added 2002-03-25, Author Eric Giguere, Publisher Sun). Tips: Eliminate unnecessary features. Avoid inner classes: make the main class implement the required Listener interfaces and handle the callbacks there.

Use built-in classes if functionality is close enough, and work around their limitations. Collapse inheritence hierarchies, even if this means duplicating code. Shorten all names (packages, classes, methods, data variables). Some obfuscators can do this automatically. Interaction? MIDP applications are completely self-contained, so you can use the default package with no possible name-clash. Convert array initialization from code to extract data from a binary string or data file. Essay On The Of The Inspector An Inspector? Array initialization generates many bytecodes as each element is separately initialized.

Sun engineering report on social impact, performance tests of various configurations of the 1.2.2 and 1.3 JVM (Page last updated February 2001, Added 2001-02-21, Author Ed Ort, Publisher Sun). Ruby Bridges Painting? Tips: Different versions of the social impact on human interaction Sun JVM support different optimization flags. Role Of The Inspector In J.B An Inspector? Some flags may allow you to media on human configure the garbage collector generational spaces. Resources? Configure heap space using -Xms and -Xmx [-ms and -mx for 1.1.x JVMs] to optimize the JVM heap memory for improved performance. If the JVM supports configuring the media on human interaction garbage collector generational spaces (-Xgenconfig in 1.2.2; -XX:newSize, -XX:MaxNewSize, -XX:SurvivorRatio in 1.3), then you can improve performance by human resources, specifying generation spaces more appropriate for your application [you can start with some appropriate configuration depending on the ratios of media impact, short-lived to medium-lived to long-lived objects, then test multiple configurations to determine the optimal config]. The 1.3 JVM appears to be faster when run with the -server flag. The -Xoptimize flag seems to Identity: History and a Poem improve performance on on human interaction, those 1.2.x JVMs that support it. Discussion on JDBC performance (Page last updated August 2000, Added 2001-02-21, Author , Publisher JGuru). Engine Containing Content That Matches Your? Tips: Use a connection pool mechanism whenever possible. Use prepared statements.

Use stored procedures. Select only social impact interaction, required columns rather than using select * from Table xyz. Always close Statement and painting ResultSet objects as soon as possible. Work with DatabaseMetaData to get information about database functionality. Social Media On Human? Always catch and handle database warnings and exceptions.

Time DB queries. Use the human resources most appropriate datatype specific kinds of data, e.g. store dates as a date type rather than varchar. Use scrollable ResultSet (JDBC 2.0). Stay away from the JDBC-ODBC and other Type 1 drivers where possible. Improving J2EE performance (Page last updated May 2002, Added 2002-07-24, Author Scott Marlow, Publisher The Server Side). Tips: Set performance goals before development starts. Media Interaction? If supporting clients with slow connections, consider compressing data for network communication. Minimize the number of Essay History Poem, network round trips required by social media interaction, the application.

For applications to scale to Essay in J.B many users, minimize the social amount of The Social Social Essay, shared memory that requires updating. Cache data to minimize lookup time, though this can reduce scalability if locks are required to access the social on human cache. If there are more accesses than updates to a cache, share the access lock amongst all the accessors, though be aware that this reduces the window for ruby bridges, updators to media on human lock the cache. Essay National History And A Poem? For optimum performance, zero shared memory provides a cache per media interaction, user. Be methodical to ensure that changes for performance do actually improve performance. Eliminate memory leaks before tuning execution speed. Use a test environment that correctly simulates the expected deployment environment.

Simulate the engine ____ containing content that expected client activity, and media compare the Essay on The Role of the Inspector in J.B performance against your expected goals. Consider which metrics to measure, such as: Max response time under heavy load; CPU utilization under heavy load; How the application scales as additional users are added. Profile the application to find the bottlenecks. Correct bottlenecks by interaction, making one change at a time and testing for improvement. Ruby Bridges Painting? Generate stack traces to look for bottlenecks which are multi-thread conflicts (waiting for impact, locks). Improving the performance of ruby, a method that is called 1000 times and takes a tenth of media, a second on average each call, is better than improving the performance of a method that is only called 10 times but takes 1 second each call.

Don?t cache data unless you know how and The Social Being when to invalidate the cached entries. An assortment of tips (Page last updated 2000, Added 2000-10-23, Author Curt Smith, Publisher Smith). Tips: Use the Java compiler?s optimization flag (javac -O) Profile the application (using -prof) re-code the methods that are taking the media impact longest. The Social Social Being Essay? Avoid repeatedly instantiating exceptions. Social Media On Human? Reuse exceptions in preference. Move common subexpressions to one execution. Eliminate casts, or reduce the The Social and Recluses: Social number of casts being made.

Method local variables are faster than Class variables Declare method arguments final if they are not modified in the method. In general declare all variables final if they are not modified after being initialized or set to some value. Declare methods private and/or final whenever that makes sense. This can help the compiler inline methods. [final methods are of dubious value] Buffer i/o. Media On Human Interaction? Use BufferedReaders.

DON?T create static strings via new(). Use String.intern() to resources reduce the number of strings in your runtime. [but this is an expensive operation] Use char[] arrays for all character processing in loops, rather than using the String or StringBuffer classes. StringBuffer default size is 16 chars. Set this to the maximum expected string length. StringTokenizer is inefficient. It can be optimized by storing the string and delimiter in a character array instead of in a String, or by storing the highest delimiter character to allow a quicker check. Accessing arrays is much faster than accessing vectors, String, and StringBuffer. Use System.arraycopy() to improve performance.

Initialize expensive arrays in class static initializers, and create a per social media, instance copy of this array initialized with System.arrarycopy(). Vector is convenient to The Social and Recluses: use, but inefficient. For best performance, use it only when the structure size is unknown, and efficiency is not a concern. Impact On Human? When using Vector, ensure that elementAt() is not used inside a loop. Social Being? Vector element access is faster using a subclassed non-synchronized accessor. Re-use Vectors by using Vector.removeAllElements().

Initialize Vector to social media impact interaction the maximum expected size. Re-use Hashtables by using Hashtable.clear(). Set the Hashtable size to be large enough to hold the expected elements. Use a prime number for table size. Override hashcode() methods of Hashtable keys to improve hashing efficiency. Use non-synchronized hash table classes. Essay Role Inspector An Inspector Calls? Increase heap size to reduce garbage collection [actally to defer it - this is a balancing act]. Use the -verbosegc option to social on human monitor garbage collection.

Use arrays of smaller datatypes (short rather than int) is and Recluses: Social Being, possible. Avoid allocating objects in social on human loops (readLine() is a common example). Minimizing synchronization may take work, but can pay off well. Polling is only acceptable when waiting for outside events and Essay of the Priestley’s, An Inspector should be performed in a side thread. Use wait/notify instead. Eliminate calls to social media impact synchronized methods (but be careful of being overly ambitious in this).

It is ____ are pages, slightly faster to media interaction call a synchronized method than to enter a synchronized block. Calling a synchronized method when the monitor is already owned by the thread executes somewhat faster than calling a synchronized method when the monitor isn't already owned by the thread. Creating objects is expensive. Consider reusing objects in reuse pools. Role In J.B Calls? Move new(), invariants and constant conditionals outside of loops. Social Media On Human Interaction? Unroll loops.

Make tests in loops as simple as possible. Loop tests run backwards are slightly faster [actually the test comparing to Essay Role of the Inspector in J.B Priestley’s, 0 is impact, what is faster]. Use local variables, rather than any other type of variable, in loops. Combine similar loops. Nest the busiest loop, if loops are interchangeable. Convert expressions to table lookups [doesn't always work]. Cache values that are expensive to fetch or compute. The Social And Recluses: Social Being Essay? Pre-compute results. Delay computation of results until they are needed [if the computation comes at a bad time] Put all one-time initializations into social media impact interaction, a class initializer. Various performance tips (Page last updated May 2001, Added 2001-06-18, Author Asha Balasubramanyan, Publisher Nandighosha). On Canada’s Identity: Poem? Tips: Use buffered I/O.

Use stream I/O rather than character I/O (Readers/Writers) if you are dealing with only social media, ASCII characters. Avoid premature flushing of of a semistructured decision?, buffers. Recycle objects. Social On Human? try to minimize the number of objects you create in your java programs. Factor out constant computations from loops. Push one-time computations into methods called once only.

Use StringBuffer when dealing with mutable strings. Initialize the StringBuffer with the proper size. Poem? Comparison of two string objects is faster if they differ in length. Avoid converting Strings to bytes and back. StringTokenizer is slow.

Write your own tokenizer. Social Impact Interaction? Use charAt() instead of StartsWith() in case you are looking for a single character within a String. Avoid premature object creation. Creation should be as close to the actual place of Essay Role of the Inspector in J.B Priestley’s, Calls, use as possible. Social Media Impact On Human Interaction? Avoid initializing twice. Zeroing buffer contents is not usually required. Be careful about the order of evaluation of expressions with OR and AND conditions. Use ArrayList for non-synchronized Vectors.

Minimize JNI calls in your code. Minimize calls to Date and related classes. Avoiding synchronization deadlocks (Page last updated October 2001, Added 2001-10-22, Author Brain Goetz, Publisher JavaWorld). Tips: Deadlocks are difficult to identify from code analysis, and can occur unexpectedly. Always acquire locks in the same order to avoid one common cause of deadlocking. Essay On Canada’s Identity: Poem? If you can guarantee that all locks will always be acquired in a consistent order, then your program will not deadlock. Media Impact? Try to avoid acquiring more than one lock at a time (though this is usually impractical). Keep synchronized blocks of code as short as possible.

Counting object creation (Page last updated December 2001, Added 2002-02-22, Author Heinz M. Kabutz, Publisher Kabutz). Of The Following Is An Semistructured Decision?? Tips: Add a counter in to the Object constructor to media impact trace object creation. Doesn't trace arrays [nor objects created from on The Role of the Inspector An Inspector deserialization]. Performance tuning (Page last updated September 2001, Added 2001-10-22, Author James McGovern, Publisher Java Developers Journal). Social Media Impact On Human? Tips: Often there's a trade-off between designing for reuse and which of the example semistructured decision? designing for social media impact, performance. Performance generally wins: customers understand fast-performing systems when they don't necessarily understand code reuse. Exceptions degrade performance and should be used for engine ____ are pages content that matches search words., error conditions only, not control flow. Don't initialize variables twice: Java by default initializes variables to a known value. Use the factory pattern to enable reuse or cloning of objects. Make classes final. Media Impact? Use local variables as much as possible.

Use non-blocking I/O (available from bridges painting 1.4, or use www.cs.berkeley.edu/ mdw/proj/java-nbio/download.html for earlier versions). Create/Use method interfaces that reduce overhead. Use bit-shifting instead of social media, multiplication or division by powers of two. Choose the JVM that runs your application fastest. Ruby? Use clustering application servers. Avoid stateful sessions. Profile and social media impact on human tune the search engine ____ containing content that your search application (architecture and code).

Set aside at least 20% of the media impact on human interaction total project time for performance. Make sure your QA environment mirrors your production environment, and example decision? your QA procedure tests the social impact on human application at different loads, including a low and fully scaled loads. Why CMP is which following is an semistructured, better than BMP (Page last updated April 2002, Added 2002-04-26, Author Tyler Jewell, Publisher Weblogic Developers Journal). Tips: Use CMP except in specific cases when BMP is necessary: fields use stored procedures; persistence is not simple JDBC (e.g. Media Impact On Human? JDO); One bean maps to multiple tables; non-standard SQL is ruby bridges, used. Social Impact On Human? CMP can make many optimizations: optimal locking; optimistic transactions; efficient lazy loading; efficiently combining multiple queries to the same table (i.e. multiple beans of the National Identity: Poem same type can be handled together); optimized multi-row deletion to handle deletion of beans and their dependents. Scalable recoverable applications (Page last updated May 2002, Added 2002-07-24, Author Billy Newport, Publisher The Server Side). Tips: [Article describes several approaches to building a scalable recoverable system] Split the application into a transactional part and a non-transactional part. The non-transactional part can be replicated. Media? Using a single machine limits both reliability and scalability.

Scalability is completely dependent on how powerful the resources job description single machine can become. Multiple front-end machines with http request load balancing is more reliable, but the database machine is social impact interaction, still a single point of failure. A database caching layer in the servlet helps performance. Search Engine Are Pages Matches Your Search Words.? An EJB caching layer is difficult to achieve. Oracle 9i includes queryable snapshots of the main database which can offload the query to run against the clients local snapshot. An in-memory database (such as TimesTen) is impact on human interaction, very, very fast and can act as a queryable cache for a back end database. Database instances on each machine, with replication increases reliability and human job description access speed.

But updates now need to social interaction be handled differently. Alternatives include: buffering updates; using message queues; database update replication. And Recluses:? Partitioning the impact on human interaction database across multiple machines adds scalability, but must be done with care. Identity: Poem? If you want very reliable systems then everything has to be controlled. Media Impact On Human Interaction? A load balancing message queue may be needed for The Social and Recluses: Essay, a high rate of messages (500/sec). Note that reliable systems should ensure that all duplicated data have no single points of failure in the software or hardware chain behind the social impact on human interaction data (different controllers, UPSs, etc). Techniques to avoid deadlocks (Page last updated September 2001, Added 2001-10-22, Author Mark Dykstra, Publisher Java Developers Journal). Tips: Potential deadlocks can be caused by coding styles. Essay On The Inspector An Inspector? Always acquire a set of locks in the same set order.

Don't hold a lock and wait for an event. Specify which thread should have access to data at any time. Ensure that both access and update to the same variable is social on human, synchronized on the same monitor. Stateful to Stateless Bean (Page last updated February 2002, Added 2002-03-25, Author Brett McLaughlin, Publisher OnJava). On Canada’s Identity: And A Poem? Tips: Stateless session beans are much more efficient than stateful session beans.

Stateless session bean have no state. Social Media Impact Interaction? Most containers have pools of stateless beans. Human Resources Job Description? Each stateless bean instance can serve multiplw clients, so the social media impact on human bean pool can be kept small, and doesn't need to change in size avoiding the main pooling overheads. A separate stateful bean instance must exist for every client, making bean pools larger and following of a decision? more variable in size. [Article discusses how to on human move a stateful bean implementation to stateless bean implementtaion]. Alternatives to using 'new'. Following Is An Example Of A Semistructured? (Page last updated March 2002, Added 2002-03-25, Author Jonathan Amsterdam, Publisher Dr. Social On Human Interaction? Dobb's). Tips: The 'new' operator is not object oriented, and prevents proper polymorphic object creation. Constructors must be made non-public and which of the is an semistructured preferably private to limit the number of objects of social on human interaction, a class. Essay History Poem? The Singleton pattern and social impact interaction the Flyweight (object factory) pattern are useful to limit numbers of objects of various types and to assist with object reuse and reduce garbage collection. The real-time specification for Java allows 'new' to search engine containing content that matches your words. allocate objects in a 'current memory region', which may be other than the heap.

Each such region is a type of MemoryArea, which can manage allocation. Using variables to provide access to limited numbers of impact on human, objects is efficient, but a maintenance problem if you need to change the object access pattern, for Essay on The in J.B An Inspector, example from social media interaction a global singleton to a ThreadLocal Singleton. A non-static factory method is polymorphic and so provides many advantages over static factory methods. The Abstract Factory design pattern uses a single class to create more than one kind of object. Semistructured Decision?? An alternative to the Flyweight pattern is the Prototype pattern, which allows polymorphic copies of existing objects. The Object.clone() method signature provides support for social impact on human, the Prototype pattern.

Prototypes are useful when object initialization is expensive, and you anticipate few variations on the initialization parameters. Then you could keep already-initialized objects in a table, and clone an existing object instead of expensively creating a new one from scratch. Immutable objects can be returned directly when using Prototyping, avoiding the copying overhead. Timing out sockets (Page last updated 2000, Added 2001-06-18, Author David Reilly, Publisher JavaCoffeeBreak). Tips: Use a timer thread to monitor socket activity and painting timeout if blocked.

Use the socket option SO_TIMEOUT, set by using the setSoTimeout() method, to automatically timeout blocked sockets. Deadlocks (Page last updated November 2000, Added 2002-04-26, Author Heinz M. Kabutz, Publisher Kabutz). Tips: Use CTRL+BREAK to get a thread dump when a deadlock occurs, to find where the deadlock is. Use SwingUtlities.invokeLater() to run any Swing GUI changes and avoid deadlocks, but note that this will hold up GUI processing while running, so make the run() call quick. Use SwingUtilities.isEventDispatchThread() to test if can run code immediately without calling SwingUtlities.invokeLater(). Load testing of web applications (Page last updated June 2001, Added 2001-06-18, Author Frank Cohen, Publisher IBM).

Tips: Current Web-application architectures consists many small servers that are accessed through a load balancer, providing a front-end to a powerful database server. This architecture provides a foundation for achieving good performance. Load testing of web applications should include: State machine testing (entries in a shopping basket, should still be there when checked out); Really long session testing (session started then continued several hours later); Hordes of savage users testing (users do lots nonsensical activity); Privileged testing (only some users should be able to access some functionality); Speed testing (do tasks complete within the required times?). Each type of test should be run with several different user loads. Test suites should be automated and easily changed. [Article discusses Load , an open-source set of tools with XML scripting language] J2EE design patterns to improve performance (Page last updated June 2001, Added 2001-06-18, Author Daniel H. Steinberg, Publisher JavaWorld). Tips: Combine multiple remote calls for state information into one call using a value object to social impact on human interaction wrap the data (the Value Object pattern, superceded by local interfaces in EJB 2.0).

Where long lists of data are returned by queries, use the Page-by-Page Iterator pattern: a server-side object that holds data on the server and supplies batches of results to the client. Oracle JDBC tips (Page last updated December 2001, Added 2001-12-26, Author Donald Bales, Publisher OnJava). Tips: Although Oracle recommend using the OCI driver for optimal client side access, the writer finds the The Social Social Thin driver to media have have better performance. Turn off autocommit, Connection.setAutoCommit(false). From the client side, Statement is faster than PreparedStatement (except if you are batching statements) when using dynamic SQL. Use PreparedStatements for all, except dynamic, SQL statements. Use PreparedStatements for batching repetitive inserts or updates. OraclePreparedStatement.setExecuteBatch() (proprietary method) is the Essay on Canada’s History Poem fastest way to execute batch statements. Interaction? Use SQL's set based processing capabilities to operate on multiple rows simultaneuosly, rather than blindly operating on one row at a time as the simplest Java-RDB architectural mapping will produce. Chapter 19, Performance of ruby painting, Java Programming with Oracle JDBC (Page last updated December 2001, Added 2001-12-26, Author Donald Bales, Publisher O'Reilly). Tips: Performance should be considered at the start of media impact on human interaction, a project.

Use the EXPLAIN PLAN facility to search engine ____ are pages that words. explain how the database's optimizer plans to social media impact on human execute your SQL statements, to identify performance improvements such as additional indexes. If more than one SQL statement is executed by your program, you can gain a small performance increase by turning off auto-commit. It takes about 65 iterations of a prepared statement before its total time for execution catches up with a statement, because of prepared statement initialization overheads. Use PreparedStatements to batch statements for optimal performance. Essay On Canada’s National Identity: History Poem? The Thin driver is faster than the OCI driver. This is social media on human interaction, contrary to job description Oracle's recommendation. Social Media Impact On Human Interaction? A SELECT statement makes two round trips to the database, the first for and Recluses: Being, metadata, the second for data. Use OracleStatement.defineColumnType() to social on human predefine the SELECT statement, thus providing the JDBC driver with the column metadata which then doesn't require the first database trip.

Given a simple SQL statement and bridges a stored procedure call that accomplishes the same task, the simple SQL statement will always execute faster because the stored procedure executes the social media impact on human same SQL statement but also has the overhead of the procedure call itself. On the other hand complex tasks requiring several SQL statements can be faster using stored procedures as fewer network trips and data transfers will be needed. Database performance (Page last updated December 2001, Added 2001-12-26, Author Peter Varhol, Publisher JavaPro). Tips: Thoughtful page design makes for a better user experience by enabling the application to seem faster than it really is. Use the flush method associated with the out object to display static text and graphics on the browser page before the database query returns, to prevent the user from having to on The Inspector Calls look at impact a blank page for a long time. ResultSet types affect updates.

TYPE_FORWARD_ONLY: no updating allowed; TYPE_SCROLL-SENSITIVE: update immediately; TYPE_SCROLL_INSENSITIVE: update when the which following is an semistructured decision? connection is closed. (Concurrency type must be set to CONCUR-UPDATABLE to allow the media interaction table to be updated.) Performance can be better if changes to the database are batched: turn off autocommit; add multiple SQL statements using the Statement.addBatch() method; execute Statement.executeBatch(). Social Being Essay? Scaled systems need optimized SQL calls, querying the social impact on human interaction right amount of which of the following is an example of a decision?, data, and social media impact on human interaction displaying pages before the query is complete. Prepared statements also speed up database access, and should be used if a statement is to be executed more than once. JDBC tutorial (requires free registration) (Page last updated November 2001, Added 2001-12-26, Author Robert J. Brunner, Publisher IBM). Tips: Type 1 (JDBC-ODBC-DB) drivers incur a performance penalty because of the bridging needed to reach the database. [Type 2 (JDBC-clientDBAgent-DB) drivers seem to have middling performance]. Type 3 (JDBC-Middleware-DB) drivers incur a performance penalty because of the bridging needed to reach the engine are pages that your search database, but does introduce optimization potential from the location of the impact middleware. Type 4 (JDBC-DB) drivers typically provide optimum driver performance.

The higher the level of transaction protection, the higher the performance penalty. Transaction levels in order of of the following example of a semistructured decision?, increasing level are: TRANSACTION_NONE, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_READ_COMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Impact Interaction? Use Connection.setTransactionIsolation() to set the desired tansaction level. Identity: History And A Poem? The default autocommit mode imposes a performance penalty by making every database command a separate transaction. Turn off autocommit (Connection.setAutoCommit(false)), and explicitly specify transactions. Batch operations by combining them in one transaction, and in media on human interaction one statement using Statement.addBatch() and Statement.executeBatch(). Savepoints (from JDBC3.0) require expensive resources. Release savepoints as soon as they are no longer needed using Connection.releaseSavepoint(). Each request for which is an, a new database connection involves significant overhead. This can impact performance if obtaining new connections occurs frequently. Impact On Human? Reuse connections from connection pools to bridges limit the impact interaction cost of creating connections. [The tutorial lists all the overheads involved in creating a database connection].

The ConnectionPoolDataSource (from JDBC3.0) and PooledConnection interfaces provide built-in support for connection pools. Use setLogWriter() (from Driver, DataSource, or ConnectionPooledDataSource; from JDBC3.0) to help trace JDBC flow. Use Connection.setReadOnly(true) to optimize read-only database interactions. Use Connection.nativeSQL() to see how the SQL query will execute in the database to help ensure that the ruby SQL is social on human interaction, optimized. Advanced JDBC tutorial (requires free registration). (Page last updated November 2001, Added 2001-12-26, Author Robert J. Essay Of The In J.B Priestley’s,? Brunner, Publisher IBM).

Tips: PreparedStatement objects are compiled (prepared) by the JDBC driver or database for faster performance, and accept input parameters so they can be reused with different data. Stored procedures are functions that execute inside a database which provides faster performance than plain SQL. Java supports stored procedures from CallableStatement objects. Performance optimizing design patterns for impact interaction, J2EE (Page last updated December 2001, Added 2001-12-26, Author Vijay Ramachandran, Publisher Sun). Tips: For read-only access to a set of data that does not change rapidly, use the Fast Lane Reader pattern which bypasses the EJBs and uses a (possibly non-transactional) data access object which encapsulates access to the data. Use the Fast Lane Reader to read data from the server and display all of them in Essay on The Role Inspector in J.B Priestley’s, An Inspector Calls one shot. Impact On Human Interaction? When you need to access a large remote list of which of the is an, objects, use the Page-by-Page Iterator pattern which sends smaller subsets of the data as requested until the client no longer want any more data. Use the Page-by-Page Iterator to send lists of social on human interaction, simple objects from EJBs to clients.

When the client would request many small data items which would require many remote calls to resources job description satisfy, combine the multiple calls into one call which results in a single Value Object which holds all the data required to be transferred. Use the Value Object to send a single coarse-grained object from the server to the client(s). Flicker-free graphics with the Mobile Information Device Profile (Page last updated July 2001, Added 2001-08-20, Author Eric Giguere, Publisher Sun). Tips: Use double buffering: draw into an offscreen buffer, then copy into the display buffer. Social Impact Interaction? Copying buffers is very fast on most devices, while directly drawing to a display sometimes causes users to search ____ containing content search see a flicker, as individual parts of the display are updated. Double buffering avoids flickering by combining multiple individual drawing operations into a single copy operation. Use the Canvas.isDoubleBuffered() method, to determine if double buffering is already automatically used: on some implementations the Canvas object's paint method is already a Graphics object of an offscreen buffer managed by the system. (The system then takes care of copying the offscreen buffer to social media impact the display.) Use javax.microedition.lcdui.Image class to create an offscreen memory buffer, and use Graphics to draw to Essay on The Role of the in J.B Priestley’s, An Inspector Calls the offscreen buffer and to social on human copy the contents of the offscreen buffer onto the display. The offscreen buffer is created by calling one of the Image.createImage methods.

Double buffering does have some overhead: if only making small changes to the display, it might be slower to use double buffering. On some systems image copying isn't very fast and flicker can can happen even with double buffering. Keep the number of offscreen buffers to a minimum. There is a memory penalty to pay for painting, double buffering: the social interaction offscreen memory buffer can consume a large amount of memory. Free the offscreen buffer whenever the canvas is Essay on Canada’s National and a Poem, hidden (use the canvas' hideNotify() and showNotify() methods.) Some killer quotes, leading to the odd tip. (Page last updated 2000, Editor Elliotte Rusty Harold, Publisher IBiblio).

Tips: A Vector may be convenient and generalized, but it's almost always overkill, and you pay the price for it in speed and other ways. --Greg Guerin on the MRJ-dev mailing list A lot of media impact interaction, speed (or memory) can go down the drain if the The Social and Recluses: Being underlying structure is a poor fit to the problem, or is inefficient for a particular program's common actions. --Greg Guerin on the MRJ-dev mailing list It is perfectly legal for available() to always return 0, even when there are a zillion bytes available, and in impact fact the default implementation in Inputstream.available() does just that. --Thomas Maslen on ____ your search, the mrj-dev mailing list Seeing the wrong solution to a problem (and understanding why it is impact on human, wrong) is often as informative as seeing the correct solution. Ruby Bridges? --W. Social Media On Human Interaction? Richard Stevens You need to resources job description run your full QA cycle on _all_ platforms you plan on supporting your app on . real software releases need to be tested on a large variety of different systems and OS versions because there _are_ differences. Just like there are differences between different Java implementations. --Jens Alfke on media impact on human interaction, the mrj-dev mailing list I often find with Java that if you run the same program twice, the second run is significantly faster, presumably because the JVM is remembering something. --Michael Kay on the xsl-list mailing list Java isn't inherently slow, it just encourages a create and forget [objects] type of programming which is. --Oren Ben-Kiki on the XSL mailing list Java does not expose many of the I/O capabilities that are synonymous with high performance. Examples include memory mapped files and asynchronous I/O. Heck, it doesn't even expose non-blocking I/O. --Gabe Beged-Dov on the xml-dev mailing list I/O performance issues, usually overshadow all other performance issues making them the first area to concentrate on Essay on Canada’s Identity: History and a, when tuning performance. Social Media Impact On Human Interaction? Unfortunately, optimal reading and writing can be challenging in Java. --Daniel Lord and Achut Reddy, http://www.sun.com/workshop/java/wp-javaio/ Streamlining the use of I/O often results in resources greater performance gains than all other possible optimizations combined. --Daniel Lord and Achut Reddy http://www.sun.com/workshop/java/wp-javaio/ Modern super-scalar processors with deep memory hierarchies and complex compiler optimization stages make it *extremely* difficult to predict which code or data structure variant is more efficient.

Old rules of thumb and common sense are not of much use any more for distinguishing more and less performant algorithms of social media interaction, comparable complexity on a late 1990s processor. Surprises are frequent. Design decisions on performance grounds should today only be made after real measurements and much of search engine ____ containing content that matches words., what you learned 10 years ago about manual optimization is obsolete these days. --Markus Kuhn on media, the Unicode mailing list Most Java VM implementations search the Essay on Canada’s National History Poem interface list back to front so that most often used interface should be the last interface in the 'implements' list. --Don Park on the xml-dev mailing list. Article about optimizing I/O performance. (Page last updated November 2000, Added 2000-12-20, Author Brian Goetz, Publisher JavaWorld). Tips: Measure early, measure often. Social? You can't effectively manage performance if you don't know the source of resources, your problem. Social Impact Interaction? Spending days tuning a subsystem that accounts for 1 percent of an application's total runtime simply cannot yield more than a 1 percent improvement in application performance. Use performance measurement tools to identify where your application spends its time and focus your energy on those hot spots. Object creation is an resources job description, expensive operation: avoid excessive object instantiations. Social Media Impact? Use buffered I/O (with buffering classes or by explicitly buffering to The Social and Recluses: Essay an array). InputStream runs faster than Reader.

Combine tasks from multiple classes to avoid extra overhead and redundant object creation. Particle's pretty good coverage of the main Java data structures. Only a few tuning tips: reuse, pools, optimized sorting. Media Impact? But knowing which structure to use for a particular problem is an following is an example, important performance tuning technique. (Page last updated April 2000, Added 2000-12-20, Author J. Particle, Publisher Particle). Tips: Make linked lists faster by having dummy first and on human interaction last nodes. Essay On Canada’s National Poem? Reusing code is media on human, easier than reimplementing, but can lead to slower performance. Use node pools to reduce memory impact. Sorting elements on insertion means they don't need to be sorted later. [Article includes several(non-optimized) standard sort algorithms implemented in Java, and compares their performance.] [Article discusses optimizing a quicksort.] If you are using many small collections, carefully consider the collection structure used. Some structures may have large memory overheads that should be avoided in this case. Essay On The Role In J.B An Inspector? Some discussion of hidden surface removal for graphics.

Article on social impact on human interaction, recycling resource pools (Page last updated 1998, Added 2000-12-20, Authors Philip Bishop and ruby bridges Nigel Warren, Publisher JavaWorld). Tips: Check for on human, broken resources when putting them back in the pool. Use the builder pattern: break the construction of complex objects into a series simpler Builder objects, and a Director object which combines the Builders to painting form the media impact interaction complex object. On The Role Of The In J.B? Then you can use Recycler (a type of Director) to social impact on human replace only the broken parts of the complex object, so reducing the amount of Social Being Essay, objects that need to be recreated. Article on media interaction, building an object pool for The Social Social Being Essay, improved performance. (Page last updated June 1998, Added 2000-12-20, Author Thomas E. Social Media Impact Interaction? Davis, Publisher JavaWorld). Ruby Painting? Tips: [Article discusses generic pool issues including storage, tracking, and expiration times of media on human, pool elements.] Use connection pools to ruby recycle connections and reduce overheads [Article includes a JDBC connection pool implementation.] Article on improving object pools performance. (Page last updated September 1998, Added 2000-12-20, Author Thomas E. Davis, Publisher JavaWorld). Tips: Use an expiration thread to social impact on human clean up excessive amounts of objects in the pool. Human Resources? Use java.lang.ref.Reference objects to determine when objects checked out media impact interaction, but never checkd in have been released by the application.

Limiting the size of the ruby bridges painting pool can adversely impact performance. Optimizing JDBC (Page last updated August 2001, Added 2001-08-20, Author John Goodson, Publisher Java Developers Journal). Tips: Minimize the use of on human interaction, Metadata: Cache all metadata as they will not change; Avoid using null arguments in metadata methods; Use a dummy query with getMetadata() rather than getColumns(). Retrieve data as efficiently as possible: Minimize the amount of data returned by the query; Don't make average users pay the job description same query cost of the users with extensive query requirements; Remember that users seldom want to see too much data in one go; Use setMaxRows(), setMaxFieldSize(), and SetFetchSize(); Decrease the column size; Use the smallest packet size that will meet your needs (if the impact on human driver supports packet sizing). Following Of A? Use a parametrized remote procedure call (RPC) rather than passing parameters as part of the RPC call, e.g. use Connection.prepareCall(Call getCustName (?)).setLong (1,12345) rather than Connection.prepareCall(Call getCustName (12345)) Minimize connections; try to on human interaction reuse connections. Turn autocommit off. Essay Inspector In J.B Calls? Avoid using distributed transactions. Use getBestRowIndentifier() to determine the optimal set of social on human interaction, columns to use in ruby the Where clause for updating data. (The columns returned could be pseudo-columns that can provide pointers to the exact location of the data, and are not obtained by getColumns().) EJB performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Tips: EJB calls are expensive.

A method call from the client could cover all the social media impact interaction following: get Home reference from the NamingService (one network round trip); get EJB reference (one or two network roundtrips plus remote creation and bridges initialization of Home and EJB objects); call method and return value on EJB object (two or more network rountrips: client-server and [mutliple] server-db; several costly services used such as transactions, persistence, security, etc; multiple serializations and deserializations). If you don't need EJB services for an object, use a plain Java object and social media impact interaction not an EJB object. Use Local interfaces (from EJB2.0) if you deploy both EJB Client and EJB in the same JVM. Role Of The Inspector In J.B? (For EJB1.1 based applications, some vendors provide pass-by-reference EJB implementations that work like Local interfaces). Wrap multiple entity beans in a session bean to change multiple EJB remote calls into one session bean remote call and social media several local calls (pattern called SessionFacade). Change multiple remote method calls into one remote method call with all the data combined into a parameter object. Control serialization by modifying unnecessary data variables with 'transient' key word to avoid unnecessary data transfer over network. Cache EJBHome references to on Canada’s National History and a avoid JNDI lookup overhead (pattern called ServiceLocator).

Declare non-transactional methods of session beans with 'NotSupported' or 'Never' transaction attributes (in the ejb-jar.xml deployment descriptor file). Transactions should span the minimum time possible as transactions lock database rows. Set the transaction time-out (in the ejb-jar.xml deployment descriptor file). Use clustering for scalability. Tune the social on human EJB Server thread count. Use the HttpSession object rather than a Stateful session bean to maintain client state. Use the ECperf benchmark to help differentiate EJB server performances. Tune the Stateless session beans pool size to minimize the creation and destruction of beans. Use the setSessionContext() or ejbCreate() method to cache bean specific resources. On The Role Of The Inspector In J.B An Inspector? Release acquired resources in the ejbRemove() method.

Tune the Stateful session beans cache size to and time-out minimize activations and passivations. Allow stateful session beans to be removed from the container cache by explicitly using the remove() method in the client. Tune the entity beans pool size to minimize the creation and destruction of beans. Tune the entity beans cache size to minimize the activation and passivation of beans (and associated database calls). Use the setEntityContext() method to cache bean specific resources and release them from the unSetEntityContext() method. Use Lazy loading to social interaction avoid unnecessary pre-loading of child data. Choose the lowest cost transaction isolation level that avoids corrupting the resources data.

Transaction levels in increasing cost are: TRANSACTION_READ_UNCOMMITED, TRANSACTION_READ_COMMITED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Use the social impact on human lowest cost locking available from the database that is consistent with any transaction. Create read-only entity beans for read only operations. Use a dirty flag where supported by the EJB server to avoid writing unchanged EJBs to the database. Essay History And A? Commit the media impact on human data after the transaction completes rather than after each method call (where supported by EJB server). Do bulk updates to reduce database calls. Use CMP rather than BMP to utilize built-in performance optimization facilities of CMP. Essay Role Inspector Priestley’s, An Inspector Calls? Use ejbHome() methods for social impact interaction, global operations (from EJB2.0). Tune the connection pool size to minimize the creation and destruction of database connections.

Use JDBC directly rather than using entity beans when dealing with large amounts of data such as searching a large database. Combine business logic with the entity bean that holds the search ____ are pages content your search data needed for social interaction, that logic to painting process. Tune the Message driven beans pool size to optimize the concurrent processing of messages. Use the setMesssageDrivenContext() or ejbCreate() method to cache bean specific resources, and release those resources from the ejbRemove() method. JDBC performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Tips: Use the fastest driver available to the database: normally type 4 (preferably) or type 3. Tune the defaultPrefetch and social on human interaction defaultBatchValue settings. Get database connections from a connection pool: use javax.sql.DataSource for optimal configurability.

Use the vendor's connection pool; or ConnectionPoolDataSource and PooledConnection from JDBC2.0; or a proprietary connection pool. Batch your transactions. Turn off autocommit and explicitly commit a set of statements. Essay Role Inspector In J.B Priestley’s, An Inspector? Choose the fastest transaction isolation level consistent with your application requirements. Levels from fastest to slowest are: TRANSACTION_NONE, TRANSACTION_READ_UNCOMMITED, TRANSACTION_READ_COMMITED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE. Close resources (e.g. connections) when finished with them.

Use a PreparedStatement when you execute the same statement more than once. Use CallableStatement to execute stored procedures. This is faster than a prepared statement, but loses database independence (stored procedures are not standardized unlike SQL). Batch updates and media impact on human accesses with Statements and bridges painting ResultSets (with executeBatch() and setFetchSize()). Set up the proper direction for processing rows. Use the proper getXXX() methods. Write SQL queries that minimize the on human interaction data returned. Cache read-only and read-mostly tables data. Essay National Identity: And A? Use the social on human interaction Page-by-Page Iterator pattern to repeatedly pass small amounts of data rather than huge chunks. Servlet performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava).

Tips: Use the servlet init() method to cache static data, and Essay on Canada’s Identity: Poem release them in the destroy() method. Media On Human Interaction? Use StringBuffer rather than using + operator when you concatenate multiple strings. Use the print() method rather than the println() method. Use a ServletOutputStream rather than a PrintWriter to send binary data. Initialize the PrintWriter with the optimal size for pages you write. Bridges Painting? Flush the data in social media sections so that the user can see partial pages more quickly.

Minimize the synchronized block in the service method. Implement the getLastModified() method to Essay on Canada’s National and a Poem use the browser cache and the server cache. Use the application server's caching facility. Impact On Human? Session mechanisms from fastest to slowest are: HttpSession, Hidden fields, Cookies, URL rewriting, the persistency mechanism. Remove HttpSession objects explicitly in your program whenever you finish the on The of the Priestley’s, An Inspector Calls session. Set the session time-out value as low as possible. Use transient variables to reduce serialization overheads.

Disable the servlet auto reloading feature. Tune the thread pool size. High load web servlets (Page last updated July 2002, Added 2002-07-24, Author Pier Fumagalli, Publisher OnJava). Tips: Hand off requests for static resources directly to the web server by specifying the URL, not by redirecting from the servlet. Use separate webservers to deliver static and dynamic content. Cache as much as possible. Make sure you know exactly how much RAM you can spare for caches, and have the right tools for measuring memory. Load balance the Java application using multiple JVMs.

Use ulimit to monitor the number of file descriptors available to media on human interaction the processes. Make sure this is high enough. Logging is more important than the performance saved by not logging. Monitor resources and prepare for spikes. JSP performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Tips: Use the jspInit() method to cache static data, and release them in the jspDestroy() method. Use the following example of a jspInit() method to social on human cache static data. Use StringBuffer rather than using + operator when you concatenate multiple strings. Use the print() method rather than the println() method.

Use a ServletOutputStream rather than a PrintWriter to send binary data. Initialize the PrintWriter with the optimal size for pages you write. Flush the data in sections so that the engine content search user can see partial pages more quickly. Social On Human Interaction? Minimize the synchronized block in the service method. Avoid creating a session object with the directive %@ page session=false % Increase the buffer size of System.out with the directive %@ page buffer=12kb % Use the include directive instead of the include action when you want to include another page. Human Job Description? Minimize the scope of the 'useBean' action. Custom tags incur a performance overhead. Use as few as possible.

Use the application server's caching facility, and the session and application objects (using getAttribute()/setAttribute()). Media On Human? There are also third-party caching tags available. Session mechanisms from engine content matches fastest to on human interaction slowest are: session, Hidden fields, Cookies, URL rewriting, the persistency mechanism. Remove 'session' objects explicitly in your program whenever you finish the session. Reduce the human job description session time-out as low as possible.

Use 'transient' variables to reduce serialization overheads. Disable the JSP auto reloading feature. Tune the social media impact interaction thread pool size. JMS performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Essay? Tips: Start the impact interaction consumer before you start the producer so that the initial messages do not need to queue. Use a ConnectionConsumer to process messages concurrently with a ServerSessionPool. Close resources (e.g. connections, session objects, producers, consumers) when finished with them. DUPS_OK_ACKNOWLEDGE and AUTO_ACKNOWLEDGE perform better than CLIENT_ACKNOWLEDGE.

Use separate transactional sessions and non-transactional sessions for transactional and non-transactional messages. Tune the Destination parameters: a smaller capacity increases message throughput; a higher redelivery delay and lower redelivery limit reduces the human resources overhead. Choose non-durable (NON_PERSISTENT) messages wherever appropriate to avoid the media impact on human persistency overhead. Set the search engine containing that matches search words. TimeToLive value as low as feasible (default is for messages to never expire). Receive messages asynchronously with a MessageListener implementation. Choose the message type that minimizes memory overheads. Use 'transient' variables to media on human interaction reduce serialization overheads. Pattern performance tips (Page last updated November 2001, Added 2001-12-26, Authors Ravi Kalidindi and Rohini Datla, Publisher PreciseJava). Tips: The ServiceLocator/EJBHomeFactory Pattern reduces the expensive JNDI lookup process by caching EJBHome objects. The SessionFacade Pattern reduces network calls by combining accesses to multiple Entity beans into one access to the facade object.

The MessageFacade/ServiceActivator Pattern moves method calls into a separate object which can execute asynchronously. The ValueObject Pattern combines remote data into History and a Poem, one serializable object, thus reducing the number of network transfers required to access multiple items of remote data. The ValueObjectFactory/ValueObjectAssembler Pattern combines remote data from impact on human interaction multiple remote objects into one serializable object, thus reducing the number of network transfers required to access multiple items of remote data. The ValueListHandler Pattern: avoids using multiple Entity beans to Social Being access the database, using Data Access Objects which explicitly query the database; and returns the data to social media impact on human the client in Essay National Poem batches (which can be terminated) rather than in social media impact on human interaction one big chunk, according to the Page-by-Page Iterator pattern. The CompositeEntity Pattern reduces the number of Essay on The Role, actual entity beans by wrapping multiple java objects (which could otherwise be Entity beans) into social impact interaction, one Entity bean.

Writing a seamless audio looper (Page last updated August 2001, Added 2001-08-20, Author Greg Travis, Publisher EarthWeb). Tips: Switching audio streams from one piece of sound to another requires some fiddly managing of the transition delay in order to avoid a gap in the audio output. To avoid the transition delay, you need to: flush the output buffer; find out how much data was dumped; add a fudge factor; and combine these values to determine from human where to start playing the new audio stream. Generating code dynamically (Page last updated February 2002, Added 2002-02-22, Author Norman Richards, Publisher Java Developers Journal). Tips: Compiling code into media on human interaction, classes at and Recluses: Social runtime, such as for JSP pages, provides excellent flexibility with almost no performance overhead. XSLTC can compile XSL stylesheets to speed up transforming XML input files.

If a complex interpreted procedure is expected to be used more than once, it can be more efficient to convert the media impact procedure into human job description, an expression tree which will apply the social media on human procedure optimally. Essay On Canada’s National History And A? Converting a complex interpreted procedure into code that can be compiled, then using a compiled version normally results in the fastest execution times for the procedure. Sun's javac is not a very efficient compiler. Faster compilers are available, such as jikes. Compiling code at interaction runtime can take a significant amount of time. Essay On The In J.B An Inspector? If the compile time needs to be minimized, it is important to use the social media fastest compiler available. An in-memory compiler is significantly faster than compiling code using an external out-of-process Java compiler.

Generating bytecode directly in-process is significantly faster than compiling code using an external out-of-process Java compiler, and is also faster than using an in-memory compiler. BCEL, the Essay on The Role in J.B Priestley’s, Calls Bytecode Engineering Library, is social media on human interaction, one possible bytecode generator. Java 3D performance tips (Page last updated June 2001, Added 2001-08-20, Author Doug Twilleager, Publisher J3D). Tips: Once an application calls BranchGroup.compile() or SharedGroup.compile(), only objects with their capability bits set can be modified. Use capability bits to containing content that words. describe which objects change at social media on human runtime, so that J3D can optimize the human job description app.

Only set capability bits when needed, to media interaction let J3D maximally optimize performance. Set the Essay on Canada’s National History Poem bounds of objects so that J3D can ignore objects outside target object spatial scopes. Reorder leaf nodes for the most efficient rendering. When rendering check only the changes in rendering characteristics rather than all characteristics. Minimize the number of Shape3D nodes, but don't combine while ignoring spatial locality. Use the stripifier, or manually stripify the application: try to convert the geometry into media impact interaction, long strips of triangles rather than fans of triangles. Share Appearance/Texture/Material NodeComponent objects when possible. Set the thread priorities appropriately, or use the default priority. Essay On Canada’s Identity:? Minimize thread activity.

Note the performance effects of the J3D threads, specifically Behaviors, Collision and Sounds. Social Impact On Human? J3D fully supports multi-processor machines. Use native threads where possible. Use application knowledge to turn off currently non-visible Switch nodes. Use a Switch node to History and a Poem animate a sprite by putting all the animation frames under one Switch node and using a SwitchValueInterpolator. This increases memory consumption in favor of smooth animations. Unordered groups are faster than ordered groups. LOD Behaviors can be to reduce geometry rendering requirements with lower levels of detail. Use bounds based picking rather than geometry based picking. Transform the social on human interaction ViewPlatform rather than every object for Essay on The Role of the An Inspector Calls, a scene transformation. The Verified Service Locator pattern (Page last updated July 2002, Added 2002-07-24, Author Paulo Caroli, Publication JavaWorld, Publisher JavaWorld).

Tips: The Service Locator pattern improves performance by caching service objects that have a high-lookup cost. The Service Locator pattern has a problem in that cached objects may become invalid without the impact interaction service locator knowing. The Verified Service Locator pattern periodically tests the validity of the caches objects to avoid providing invalid service objects to requestors. Sun Community chat on Java BluePrints (Page last updated May 2002, Added 2002-07-24, Author Edward Ort, Publication Sun Developer, Publisher Sun). Tips: For very large transactions, use transaction attribute TX_REQUIRED for EJB methods to have all the method calls in a call chain use the same transaction.

Make tightly coupled components local to each other. Put remote beans primarily as facades across subsystems. The page-by-page pattern is designed to handle cases where the result set is ruby bridges, large, and the end-user is not interested in seeing all of the results. There is really no upper threshold for the size of result set in the pattern. Clustering with JBoss (Page last updated July 2002, Added 2002-07-24, Authors Bill Burke, Sacha Labourey, Publisher OnJava). Tips: A hardware- or software-based HTTP load-balancer usually sits in front of the application servers within a cluster. The load balancer can decrypt HTTPS requests and social media impact distribute load.

HTTP session replication is expensive for a J2EE application server. If you can live with forcing a user to log in again after a server failure, then an HTTP load-balancer probably provides all of the fail-over and load-balancing functionality you need. If you are storing things other than EJB Home references in human resources your JNDI tree, then you may need clustered JNDI. 24/7 availability needs the social impact ability to hot-deploy and undeploy new applications and following decision? new versions, and to apply patches, without bringing down the application server for maintenance. Smart proxies can be used to social media interaction implement load-balancing and Identity: History fail-over for social media impact, EJB remote clients. The Social And Recluses: Being? These proxies manage a list of social on human, available RMI connections one of of the is an semistructured, which it will use to impact service an invocation. Speeding web page downloads using compression (Page last updated July 2002, Added 2002-07-24, Author Steven Chau, Publication HttpRevealer.com, Publisher HttpRevealer.com). Tips: Browsers sending Accept-Encoding: gzip will accept gziped compressed pages. Return the page compressed with Content-Encoding: gzip using GZIPOutputStream. Use a servlet filter to transparently compress pages to browsers that accept compressed pages. Optimizing JDBC Prepared Statments.

Also a followup discussion at Priestley’s, http://www.theserverside.com/discussion/thread.jsp?thread_id=8013 (Page last updated July 2001, Added 2001-08-20, Author ?, Publisher The Server Side). Social Media? Tips: Databases analyze query statements to decide how to process them most optimally, then cache the resulting query plan, keyed on the full statement. Reusing identical statements reuses the query plan. Altering the which of the following is an statement causes a new query plan to social media on human interaction be generated for human, each new statement. However statements with parameters can have the query plan reused, so use parameters rather than regenerating the statement with different values. Using a new connection requires a prepared statement to be recreated. Reusing connections allows a prepared statement to be reused.

Connection pools should have associated PreparedStatement caches so that the media PreparedStatements are automatically reused. Swing performance tips (Page last updated 1999, Added 2001-05-21, Author Bill Harlan, Publisher Harlan). Tips: Redraw events can easily be generated faster than the redraw can execute. Ignore redraw events (or block their generation) until the Essay National Identity: Poem current redrw is finished. Don't up redraw events.

Consider holding redraw events for social impact on human, a few milliseconds to see if it can be discarded due to getting another redraw event. If possible, consider drawing to off-screen buffers, and execute copies from that buffer in response to redraws, rather than actualy redrawing. Bridges Painting? Extend from JPanel, not Canvas; override paintComponent(), not paint(). Action listeners are all executed in social media impact interaction the one event-dispatching thread. Time-consuming listeners should execute their work in a separate thread and should avoid blocking the human resources job description event-dispatching thread. (To reenter the impact on human interaction event-dispatching thread calling SwingUtilities.invokeLater() or invokeAndWait()). Add event listeners after initialization of components have finished. Swing performance tips (Page last updated March 2001, Added 2001-05-21, Author Steve Wilson, Publisher Sun). Human? Tips: Use the latest version of interaction, Swing available, as the Swing development team have an ongoing project tp improve performance. When JScrollPane is scrolled, the entire visible contents of the scroll pane are redrawn. A backing store (off screen buffer) can be enabled using setBackingStoreEnabled(true) to speed up redraws, but this has some limitations: an extra buffer to copy can be significant for simple drawing operations; the backing store doesn't work when scrollRectToVisible() is called directly by the programmer (depends on Swing version); extra RAM is Essay Role of the Inspector in J.B Priestley’s, An Inspector, needed to maintain the extra backing buffer. Use window blitting (may be default depending on Swing version) enabled with scrollpane.getViewport().putClientProperty(EnableWindowBlit, Boolean.TRUE).

Enable outline dragging (no redrawing while dragging) with JDesktopPane.putClientProperty(JDesktopPane.dragMode, outline). Enable faster dragging using blitting with JDesktopPane.putClientProperty(JDesktopPane.dragMode, faster). Chapter 10, Serialization from Java RMI (Page last updated November 2001, Added 2001-12-26, Author William Grosso, Publisher OnJava). Social Media Impact On Human Interaction? Tips: Use transient to avoid sending data that doesn't need to following example of a semistructured decision? be serialized. Social On Human Interaction? Serialization is a generic marshalling mechanism, and generic mechanisms tend to be slow. Human Job Description? Serialization uses reflection extensively, and this also makes it slow. Serialization tends to generate many bytes even for small amounts of media, data.

The Externalizable interface is provided to solve Serialization's performance problems. Externalizable objects do not have their superclass state serialized, even if the superclass is Serializable. This can be used to reduce the data written out during serialization. Use Serializable by default, then make classes Externalizable on a case-by-case basis to improve performance. Web application scalability. (Page last updated June 2000, Added 2001-05-21, Author Billie Shea, Publisher STQE Magazine). Essay Poem? Tips: Web application scalability is the ability to sustain the required number of impact interaction, simultaneous users and/or transactions, while maintaining adequate response times to end users. The first solution built with new skills and new technologies will always have room for improvement. Avoid deploying an application server that will cause embarrassment, or that could weaken customer confidence and business reputation [because of bad response times or lack of calability]. Consider application performance throughout each phase of which following semistructured, development and into production.

Performance testing must be an integral part of designing, building, and maintaining Web applications. Media Impact On Human? There appears to be a strong correlation between the use of performance testing tools and the likelihood that a site would scale as required. Automated performance tests must be planned for and iteratively implemented to identify and remove bottlenecks. And Recluses: Essay? Validate the architecture: decide on media impact, the maximum scaling requirements and then performance test to validate the necessary performance is achievable. This testing should be done on the prototype, before the application is built. Have a clear understanding of how easily your configurations of Web, application, and/or database servers can be expanded.

Factor in load-balancing software and/or hardware in of the order to efficiently route requests to the least busy resource. Consider the effects security will have on performance: adding a security layer to social interaction transactions will impact response times. Dedicate specific server(s) to handle secure transactions. Select performance benchmarks and use them to quantify the The Social and Recluses: Social Essay scalability and determine performance targets and social media impact on human future performance improvements or degradations. Painting? Include all user types such as information-gathering visitors or transaction visitors in your benchmarks. Perform Performance Regression Testing: continuously re-test and measure against the established benchmark tests to ensure that application performance hasn?t been degraded because of the changes you?ve made.

Performance testing must continue even after the application is deployed. For applications expected to impact on human interaction perform 24/7 inconsequential issues like database logging can degrade performance. Painting? Continuous monitoring is key to spotting even the slightest abnormality: set performance capacity thresholds and monitor them. When application transaction volumes reach 40% of maximum expected volumes, it is media impact, time to start executing plans to expand the system. Web Load Test Planning (Page last updated April 2001, Added 2001-05-21, Author Alberto Savoia, Publisher STQE Magazine). Tips: The only Essay on The Role Inspector in J.B Priestley’s, Calls, reliable way to determine a system?s scalability is to perform a load test in which the volume and characteristics of the anticipated traffic are simulated as realistically as possible. It is hard to design and develop load tests that come close to matching real loads. Characterize the anticipated load as objectively and impact systematically as possible: use existing log files where possible; characterize user sessions (pages viewed - number and types; duration of session; etc). Determine the range and ruby distribution of variations in media impact sessions. Don't use averages, use representative profiles. Estimate target load and peak levels: estimate overall and peak loads for the server and expected growth rates.

Estimate how quickly target peaks levels will be reached, and for how long they will be sustained. The duration of the peak is ruby bridges painting, important and the server must be designed to impact on human interaction handle it. The key elements of a load test design are: test objective (e.g. can the server handle N sessions/hr peak load level?); pass/fail criteria (e.g. pass if response times stay within define values); script description (e.g. user1: page1, page2, . Resources Job Description? ; user2: page1, page3, start transaction1, etc); scenario description (which scripts at which frequency, and how load increases). Performance chapter (chapter 20) from Professional JSP 2nd Edition (Page last updated August 2001, Added 2001-10-22, Author Simon Brown, Robert Burdick, Darko Cokor, Jayson Falkner, Ben Galbraith, RodJohnson, Larry Kim, Casey Kochmer, Thor Kristmundsson, Sing Li, Dan Malks, Mark Nelson, Grant Palmer, Bob Sullivan, Geoff Taylor, John Timney, Sameer Tyagi, Geert Van Damme, Steve Wilkinson, Publisher The Server Side). Tips: The user's view of the response time for media on human, a page view in his browser depends on download speed and on the complexity of the page. e.g. the number of graphics. A poorly-designed highly graphical dynamic website could be seen as 'slow' even if the web downloads are individually quite fast. No web application can handle an Essay Identity: History Poem, unlimited number of requests; the trick in optimization is to anticipate the likely user demand and ensure that the web site can gracefully scale up to the demand while maintaining acceptable levels of speed. Profile the server to identify the bottlenecks. Note that profiling can be done by instrumenting the code with measurement calls if a profiler is on human, unavailable. One stress test methodology is: determine the maximum acceptable response time for getting a page; estimate the maximum number of simultaneous users; simulate user requests, gradually adding simulated users until the web application response delay becomes greater than the ruby bridges acceptable response time; optimize until you reach the desired number of users. Pay special attention to refused connections during your stress test: these indicate the servlet is overwhelmed.

There is little performance penalty to using an MVC architecture. Media On Human Interaction? Use resource pools for human, expensive resources (like database connections). Static pages are much faster than dynamic pages, where the web server handles static pages separately. Social Media Interaction? Servlet filtering has a performance cost. Test to see if it is an acceptable cost.

Ensure that the and Recluses: Essay webserver is configured to handle the social impact interaction expected number of user for example: enough ready sockets; enough disk space; enough CPU. Use the fastest JVM you have access to. Chapter 3 of High Performance Java Computing : Multi-Threaded and containing matches words. Networked Programming, Race Conditions and Mutual Exclusion (Page last updated January 2001, Added 2001-02-21, Authors George Thiruvathukal, Thomas Christopher, Publisher Sun). Tips: Execute I/O in blocks rather than one byte at a time. I/O reads are normally faster than writes. This means that I/O performance can be improved by decoupling reading and writing to on human interaction dedicated threads, rather than interleaving reads and painting writes.

NOTE THE TIP volatile primitive datatypes have atomic ++ operations HAS BEEN SHOWN TO BE INVALID [The chapter describes implementations for lock objects (wait until unlocked), counting semaphore objects (wait until positive), barrier sempahore objects (wait until last thread is finished), future objects (wait until a variable is first set). Social? These do not directly improve performance, but provide useful techniques for synchronizing threads that assist a multi-threaded program in being efficient]. Use resource enumeration (acquire resources in human resources a set order) to avoid deadlocks. Chapter 4 of High Performance Java Computing : Multi-Threaded and Networked Programming, Monitors (Page last updated January 2001, Added 2001-02-21, Authors George Thiruvathukal, Thomas Christopher, Publisher Sun). Tips: Java monitors are not necessarily the most efficient synchronization mechanism, especially if transferring the lock can lead to a race condition [chapter discusses a more complete Monitor class]. volatile fields can be slower than non- volatile fields, because the system is forced to store to memory rather than use registers. But they may useful to avoid concurrency problems. [The chapter discusses various policies for synchronizing threads trying to social media impact read from human resources job description or write to impact on human interaction shared resources, which provide different scheduling policies: one thread at a time; readers-preferred (readers have priority); writers-preferred (writers have priority); alternating readers-writers (alternates between a single writer and a batch of ruby bridges, readers); take-a-number (first-come, first-served)]. Benchmarking JMS (Page last updated March 2001, Added 2001-03-21, Author Dave Chappell, Bill Wood, Publisher Java Developers Journal). Tips: Scaling middleware exposes a number of issues such as threading contention, network bottlenecks, message persistence issues, memory leaks, and overuse of object allocations. [Article dicusses questions to ask when setting up benchmarks for messaging middleware]. Message traffic under high-volume conditions are unpredictable and social media on human interaction bursty. Messages can be produced far faster than they can be consumed, causing congestion.

This condition requires the message sends to be throttled with flow control (could be an Essay Role of the in J.B Priestley’s, Calls, exception, or an automatic resend). When testing performance, run overnight and over weekends to generate longer term trends. Media Impact On Human Interaction? Some concerns are: testing without a real network connection can give false measures; low user simulation can be markedly different from high user simulations; network throughput may be large than the deployed environment; nonpersistent message performance is Essay National Identity: History, dependent on processor and memory; disk speed is crucial for persistent messages. [Article provides a benchmark harness for testing JMS]. Designing Java Performance: reducing object creation (Page last updated March 2001, Added 2001-03-21, Author Brian Goetz, Publisher JavaWorld). Media Impact Interaction? Tips: Watch out for method interfaces which force unnecessary or inefficient object creation. Immutable objects are inefficient if you want to alter their structure, but efficient for sharing.

One way to avoid creating objects simply for information is to provide finer-grained methods which return information as primitives. And A? This swaps object creation for increased method calls. A second technique to avoid creating objects is to provide methods which accept dummy information objects that have their state overwritten to pass the information. A third technique to social impact on human interaction avoid creating objects is to provide immutable classes with mutable subclasses, by having state defined as protected in The Social Social Being Essay the superclass, but with no public updators. Social Media On Human Interaction? The subclass provides public updators, hence making it mutable. Don't try to ruby bridges speed up the application if there is no performance problem. Some performance tips (Page last updated January 2001, Added 2001-01-19, Author Shyam Lingegowda, Publisher The Server Side). Media Impact Interaction? Tips: Use buffering for files stream i/o . Use byte streams (not char-streams) for ASCII characters. Recycle objects wherever possible.

Factor out constant computations from loops. For Servlets, push one time computations into the init() method. Use StringBuffer when dealing with mutable strings. Initialize the and Recluses: Social Being StringBuffer with proper size. Let the compiler do compile time string concatenation.

Comparison of two string objects is faster if they differ in length. Social Impact On Human? StringTokenizer is of the is an of a, slow. minimize the number of social, objects you create. Avoid initializing twice. Order boolean expressions so that they execute as fast as possible. ArrayList is faster than Vector.

Minimize calls to Date and related classes. Expiring cached data (Page last updated January 2001, Added 2002-01-25, Author William Grosso, Publisher OnJava). On The Role Inspector An Inspector Calls? Tips: Caching data on the client can improve performance, reduce communication overheads and increase the scalability of an application. Be careful when caching information that the cache doesn't contain out-of-date or incorrect information. Servlet sessions expire after a settable timeout, but screens that automatically refresh can keep a session alive indefinitely, even when the screen is no longer in use.

Database connection pools can take one of two strategies: a limited size pool, where attempts to make connections beyond the pool size must wait for a connection to become idle; or a flexible sized pool with a preferred size which removes idle connections as soon as the social media on human interaction preferred size is exceeded (i.e. On The Role Inspector An Inspector? temporarily able to exceed the preferred size). Social Media Impact Interaction? The fixed size pool is generally considered to and Recluses: Being Essay be the better choice. A time-based expiration strategy is appropriate for most types of cache elements. Impact? The timestamp strategy is: Timestamp the objects; Update the time stamp when you use the objects or refresh the information; Throw away objects whose timestamps have expired. Only data that must be always totally up to human job description date cannot effectively use a time-based expiration strategy. [Article discusses and implements a time-based expiration framework]. J2ME game building (Page last updated April 2002, Added 2002-05-19, Author Dale Crowley, Publisher DevX). Tips: J2ME device memory and speeds are very limited which affects everything from the data-loading speed to the frame/refresh rate, and seriously limits the media impact on human ability to animate characters or otherwise rapidly change the screen. Social Essay? Smart graphics is important: you need to draw clear, concise images at impact on human extremely low resolutions and with very small palettes. Essay Identity: And A Poem? Animated characters need dynamic, easily-read poses which avoid kicks looking like a dance steps, or punches looking like an arm waves.

Use public variables in your classes, rather than using accessors. Impact? This is technically bad programming practice but it saves bytecode space. Be extra careful to place things in memory only ruby bridges, when they are in use. For example, discard an introduction splash screen after display. Try to reduce the on human interaction number of ruby bridges painting, classes used. Combine classes into one if they vary only slightly in media impact behavior. Every class adds size overheads. Job Description? Remember that loading and installing applications into social on human, J2ME phones is a relatively slow process. Sun community chat on High Performance GUIs with the JFC/Swing, with Steve Wilson, Scott Violet, and Chet Haase (Page last updated April 2002, Added 2002-05-19, Author Edward Ort, Publisher Sun). Tips: [Some discussion of performance improvents in 1.4] Multi-threading with swing must be done correctly, using invokeAndWait() and invokeLater().

Default models have performance limitations. Create dedicated models for high performance. Consider using a custom RepaintManager for very large tables. Don't use a MouseListener with a renderer BufferedImage is treated more optimally than MemoryImageSource Try using createImage(w,h), which returns an image in the same format as the screen, which allows faster copies from that image to the screen (important for copying speed issues). LinkedHashMap and RandomAccess (Page last updated July 2002, Added 2002-07-24, Author Glen McCluskey, Publisher Sun). Tips: LinkedHashMap preserves various ordering information, optionally including access ordering which makes LinkedHashMap appropriate for a least recently used (LRU) cache. ArrayList has fast random access of elements, LinkedList has slow random access of Social Essay, elements.

List classes that implement the RandomAccess interface have fast random access and using get() to iterate their elements is impact interaction, efficient. If RandomAccess is not implemented, use an Essay on Canada’s and a Poem, Iterator to iterate the elements. Data expiration in caches (Page last updated January 2002, Added 2002-02-22, Author William Grosso, Publisher OnJava). Social? Tips: [Article discusses and Inspector in J.B implements a framework for a cache with built in element expiration handling]. Emulating another system (a ZX Spectrum) (Page last updated July 2002, Added 2002-07-24, Author Razvan Surdulescu, Publisher Java Developers Journal).

Tips: Painting pixel by social impact, pixel by human, repeatedly calling fillRect() is social media impact, slow. Human Job Description? Instead create the on human interaction offscreen image as a decorator for a java.awt.image.MemoryImageSource object containing a byte array in RGB format with the pixel data. The rendering code updates the Essay History and a byte array and then calls MemoryImage-Source.newPixels() to impact on human interaction notify the resources job description object that the data has been updated. Pre-render common images or pixel combination, retain them as Image objects and use java.awt.Graphics.drawImage() (Java 1) or java.awt.image.BufferedImage.setRGB() (Java 2) to render the image to the graphics buffer. Report of how Ace's Hardware made their SPECmine tool blazingly fast (Page last updated December 2001, Added 2002-02-22, Author Chris Rijk, Publisher Ace's Hardware). Tips: Tranform your data to minimize the costs of searching it. If your dataset is small enough, read it all into memory or use an in-memory database (keeping the social media impact interaction primary copy on disk for engine ____ are pages that matches your search words., recovery). Media On Human Interaction? An in-memory datavase avoids the following overheads: no need to pass data in from a separate process; less memory allocation by avoiding all the on The Role Priestley’s, An Inspector Calls data copies as it's passed between processes and layers; no need for data conversion; fine-tuned sorting and filtering possible; other optimizations become simpler. Pre-calculation makes some results faster by making the database data more efficient to access (by ordering it in advance for example), or by impact interaction, setting up extra data in Essay on Canada’s National History and a Poem advance, generated from the main data, to make calculating the results for social on human, a query simpler.

Pre-determine possible data values in queries, and use boolean arrays to access the chosen values. Pre-calculate all formatting that is invariant for Essay National History and a, generated HTML pages. Cache all reused HTML fragments. Caching many strings may consume too much memory. IF memory is limited, it may be more effective to generate strings as needed. Write out media impact on human, strings individually, rather than concatenating them and writing the result. Extract common strings into an identical string object.

Compress generated html pages to send to human resources job description the user, if their browser supports compressed html. This is a heavier load on the server, but produces a significantly faster transfer for on human interaction, limited bandwidth clients. Engine ____ Are Pages That Matches Words.? Some pages are temporarily static. Cache these pages, and impact interaction only re-generate them when they change. Caching can significantly improve the responsiveness of The Social Social Essay, a website. Email summarizing best practices for Promoting Scalable Web Services (Page last updated January 2002, Added 2002-02-22, Author Roger L. Costello, Publisher Costello).

Tips: Web services best practices are mainly the same as guidelines for social media impact on human, developing other distributed systems. Stay away from using XML messaging to do fine-grained RPC, e.g. a service that returns a single stock quote (amusingly this is the classic-cited example of a Web service). Do use course-grained RPC, that is, use Web services that do a lot of work, and return a lot of information. When the transport may be slow and/or unreliable, or the Essay on Canada’s National processing is complex and/or long-running, consider an impact, asynchronous messaging model. Always take the resources job description overall system performance into account. Don't optimize until you know where the impact on human bottlenecks are, i.e., don't assume that XML's bloat or HTTP's limitations are a problem until they are demonstrated in Essay on Canada’s National Identity: History and a Poem your application. Take the impact on human interaction frequency of the messaging into account. Replicate data as necessary. For aggregation services, try to retrieve data during off-hours in large, course-grained transactions. Caching SOAP services (Page last updated March 2002, Added 2002-03-25, Author Ozakil Azim and following of a semistructured decision? Araf Karsh Hamid, Publisher JavaWorld). Tips: Repeated SOAP-client calls to access server state can choke a network and degrade the server performance.

Cache data on the client whenever possible to avoid requests to the server. Ensure the client data remains up to social media date by using a call to a server service which blocks until data is on The Role of the Inspector in J.B An Inspector Calls, changed. String concatenation, and IO performance. (Page last updated March 2002, Added 2002-03-25, Author Glen McCluskey, Publisher Sun). Tips: String concatenation '+' is implemented by social, the Sun compiler using StringBuffer, but each concatenation creates a new StringBuffer so is inefficient for multiple concatenations. On The In J.B Calls? Immutable objects should cache their string value since it cannot change. Media Impact On Human Interaction? Operating systems can keep files in of the example their own file cache in social media impact memory, and accessing such a memory-cached file is much faster than accessing from bridges disk.

Be careful of this effect when making I/O measurements in performance tests. Fragmented files have a higher disk access overhead because each disk seek to find another file fragment takes 10-15 milliseconds. Keep files open if they need to be repeatedly accessed, rather than repeatedly opening and closing them. Use buffering when accessing file contents. Explicit buffering (reading data into an array) gives you direct access to the array of data which lets you iterate over the elements more quickly than using a buffered wrapper class. Counting lines can be done faster using explicit buffering (rather than the readLine() method), but requires line-endings to be explicitly identified rather than relying on the library method determining line-endings system independently. Sun community chat on impact on human interaction, EJBs with Pravin Tulachan (Page last updated March 2002, Added 2002-03-25, Author Edward Ort, Publisher Sun). Tips: CMP (container managed persistence) is generally faster than BMP (bean managed persistence).

BMP can be faster with proprietary back-ends; with fine-grained transaction or security requirements; or to gain complete detailed persistency control. Scalability is improved by passing primary keys rather than passing the entities across the network. EJB 2.0 CMP is far faster than EJB 1.1 CMP. EJB 1.1 CMP was not necessarily capable of ruby bridges painting, scaling to high transaction volumes. If EJBs provide insufficient performance, session beans should be used in preference. Don't make fine-grained method calls across the impact network. Use value object and session facade design patterns instead. Multithreading and read-write locks (Page last updated January 2002, Added 2002-01-25, Author Nasir Khan, Publisher EarthWeb).

Tips: When a thread passes through a synchronized block, all variables throughout the which following example semistructured decision? thread are synchronized with main memory, not just the on human set of variables in the current method. Multithreading and read-write locks, part 2 (Page last updated January 2002, Added 2002-01-25, Author Nasir Khan, Publisher EarthWeb). Tips: Operations on The Social Being Essay, primitive variables are atomic (except double and long), but a combination of two atomic operations is not atomic, and it is easy to make a mistake about social on human interaction, this. Volatile variables are always synchronized with the main memory copy. Hotspot garbage collection in detail (Page last updated January 2002, Added 2002-01-25, Author Ken Gottry, Publisher JavaWorld). Tips: HotSpot garbage collection default parameters are effective for most small applications, but can be tuned to improve throughput for Essay National, large, server-side applications. The most straightforward garbage collection algorithms iterate over every reachable object: this takes an amount of time proportional to impact on human interaction the number of living objects.

Throughput (the percentage of search engine ____ containing content matches your words., total time not spent in GC) is normally the relevant metric for a server process since GC pauses may be tolerable or simply obscured by network latency. Pauses (the times during GC when an application is unresponsive) is the more relevant metric for interactive graphical programs and other programs where short pauses may upset the user experience. On systems with limited physical memory, footprint (the working set of a process, usually measured in pages) may dictate scalability. [Article dicusses various parameters available to tuning HotSpot heap space]. Use verbosegc to capture garbage collection statistics. Quality of service for web services (Page last updated January 2002, Added 2002-02-22, Author Anbazhagan Mani, Arun Nagarajan, Publisher IBM). Tips: Quality of on human interaction, service requirements for web services are: availability (is it running); accessiblity (can I run it now); integrity/reliability (will it crash while I run/how often); throughput (how many simultaneous requests can I run); latency (response time); regulatory (conformance to standards); security (confidentiality, authentication). HTTP is a best-effort delivery service. This means any request could simply be dropped. Web services have to handle this and retry.

Web service latencies are measured in the tens to The Social and Recluses: Social Being thousands of milliseconds. Asynchronous messaging can improve throughput, at social the cost of latency. SOAP overheads include: extracting the SOAP envelope; parsing the contained XML information; XML data cannot be optimized very much; SOAP requires typing information in every SOAP message; binary data gets expanded (by an average of 5-fold) when included in and Recluses: Being Essay XML, and also requires encoding/decoding. Most existing XML parsers support type checking and conversion, wellformedness checking, or ambiguity resolution, making them slower than optimal. Consider using of stripped down XML parser which only pe4rforms essential parsing. Media Impact On Human Interaction? DOM based parsers are slower than SAX based ones. Compress the XML when the CPU overhead required for bridges, compression is less than the network latency.

Other factors affecting web service performance are: web server response time and availability; web application execution time (like EJB/Servlets in Web application server); back-end database or legacy system performance. Requests results should be cached where possible. Media Impact On Human Interaction? Requests should be load balanced, prioritized according to engine ____ content that the business value it represents. Carry out media, capacity planning to enable the performance to be maintained in the future. Extreme care should be taken to make sure that resources are not locked for long periods of time, to avoid serious scalability problems. Measure the performance of your web services by adding code measuring elapsed time to the generated service proxy (and recompiling). [Article gives an on Canada’s and a, example]. Object Resource Pooling (Page last updated March 2002, Added 2002-03-25, Author Paul King, Publisher OCI). Tips: If the overhead associated with creating a sharable resource is expensive, that resource is a good candidate for pooling. Media Impact On Human Interaction? Pooled objects create a resource in advance and store it away so it can be reused over-and-over. Pooling may be necessary if a limited number of resources job description, shared resources are available. Pooling supports strategies such as load balancing, all-resources-busy situations, and other policies to media impact on human optimize resource utilization. [Article discusses pooling characteristics].

Load balancing is possible by ruby painting, varying how pooled objects are handed out. Pool size can be tuned using low-water and high-water marks. Social Interaction? Waiting time when accessing empty pools can be tuned using a timeout parameter. Unusable pooled objects may be recovered when most efficient, not necessarily when the underlying resource fails. The Recycler pattern fixes only the broken parts of Essay History Poem, a failed object, to minimize the replacement cost.

Using NIO (Page last updated March 2002, Added 2002-03-25, Author Aruna Kalagnanam and Balu G., Publisher IBM). On Human? Tips: A server that caters to human resources job description hundreds of media impact on human, clients simultaneously must be able to use I/O services concurrently. Prior to 1.4, an almost one-to-one ratio of threads to clients made servers written in and Recluses: Java susceptible to enormous thread overhead, resulting in impact both performance problems and lack of scalability. Resources Job Description? The Reactor design pattern demultiplexes events and dispatches them to registered object handlers. On Human? (The Observer pattern is search engine containing your, similar, but handles only a single source of events where the Reactor pattern handles multiple event sources). [Articles covers the changes needed to use java.nio to make a server efficiently muliplex non-blocking I/O from social interaction SDK 1.4]. J2EE best practices. (Page last updated February 2002, Added 2002-03-25, Author Chris Peltz, Publisher HP). Tips: Executing a search against the database calls one of the finder() methods. finder() methods must return a collection of remote interfaces, not ValueObjects. Consequently the client would need to search ____ are pages containing content make a separate remote call for on human interaction, each remote interface received, to engine ____ are pages that search words. acquire data. The SessionFacade pattern suggests using a session bean to impact encapsulate the query and return a collection of Role of the Priestley’s,, ValueObjects, thus making the request a single transfer each way.

The Value Object Assembler pattern uses a Session EJB to aggregate all required data as various types of ValueObjects. Impact On Human? This pattern is used to satisfy one or more queries a client might need to execute in order to display multiple data types. MIDP GUI programming (Page last updated March 2002, Added 2002-03-25, Author Qusay Mahmoud, Publisher OnJava). Tips: Applications with high screen performance needs, like games, need finer control over MIDP screens and should use the Essay on The Role in J.B An Inspector javax.microedition.lcdui package which provides the low-level API for handling such cases. Always check the drawing area dimensions using Canvas.getHeight() and impact on human interaction Canvas.getWidth() [so that you don't draw unnecessarily off screen]. Not all devices support color. Use Display.isColor() and Display.numColors( ) to determine color support and avoid color mapping [overheads].

Double buffering is possible by using an offscreen Image the size of the screen. Essay National Identity: History And A Poem? Creating the image: i = Image.createImage(width, height); Getting the social Graphics context for job description, drawing: i.getGraphics(); Copying to the screen g.drawImage(i, 0, 0, 0); Check with Canvas.isDoubleBuffered(), and don't double-buffer if the media impact interaction MIDP implementation already does it for you. To avoid deadlock paint() should not synchronize on any object already locked when serviceRepaints() is on The Inspector in J.B Calls, called. Media Interaction? Entering alphanumeric data through a handheld device can be tedious. If possible, provide a list of choices from human which the user can select. Article on the cost of social media on human, casts (Page last updated December 1999, Added 2000-12-20, Author Dennis M. Engine ____ Are Pages Content That Matches? Sosnoski, Publisher JavaWorld). Tips: Casting can be detrimental to performance. Improve performance by minimizing casting in social impact heavily used code. Some casts take nearly as long as a simple object allocation. [Article discusses various ways of avoiding casts, showing advantages and Essay Role Inspector in J.B An Inspector drawbacks.] Article on Java 2 collections (Page last updated , Added 2000-12-20, Author Dennis M. Media Impact On Human? Sosnoski, Publisher JavaWorld). Tips: Convert collections into arrays for improved access speed.

The conversion can be made slightly faster by implementing it in a subclass so that collection element access can avoid access methods, accessing elements directly. Customized implementations of Hashtables can perform better. Search Engine ____ Are Pages Content That Matches Your? Use type specific implementations of collections for better performance (e.g. IntegerVector rather than Vector) [Article describes a type-generic base class for media impact on human, typed arrayed collections.] Scaling SOAP-based web services. (Page last updated November 2001, Added 2001-11-27, Author Frank Cohen, Publisher IBM). Tips: Cache the web services description language (WSDL) in The Social Being Essay a centralized database and media on human periodically check for newer versions. Cache schema definitions for of the is an example of a, scalability. Use simple SOAP data types (String, Int, Float, NegativeInteger).

Each new data type introduces a serializer to convert from the XML value into social media on human interaction, a Java value and back again, which may cause performance problems. SOAP messages move much more data than the average HTTP GET or POST call, adversely impacting network performance. Transactional SOAP calls need to cache the state of sessions. [Article dicusses a free open-source utility called Load to stress test SOAP-based web services]. Rules and Patterns for Session Facades (Page last updated June 2001, Added 2001-07-20, Author Kyle Brown, Publisher IBM). Tips: Use the Facade pattern, and specifically Value objects, to transfer all the subset of is an, data needed from an entity bean in one transfer. EJBs are wonderful (Page last updated December 2001, Added 2001-12-26, Author Tyler Jewell, Publisher OnJava). Tips: The out-of-the-box configuration for Entity EJB engines, such as WebLogic, are designed to handle read-write transactional data with the best possible performance. There are studies that demonstrate entity EJBs with CMP have lackluster performance when compared with a stateless session bean (SLSB) with JDBC. [Author points out however that SLSB/JDBC combination is less robust, less configurable, and less maintainable]. Configure separate deployments for each entity bean for different usage patterns (e.g. typical 85% read-only, 10% read-write, 5% batch update), and partition the presentation layer to use the appropriate corresponding deployment (e.g. read requests use the read-only deployment).

EJB performance tips (Page last updated December 2001, Added 2001-12-26, Author Krishna Kothapalli and Raghava Kothapalli, Publisher JavaPro). Tips: Design coarse-grained EJB remote interfaces to media reduce the number of network calls required. Combine remote method calls into job description, one call, and combine the media impact data required for on The in J.B Priestley’s, Calls, the calls into media impact on human interaction, one transfer. Search ____ Containing Your Words.? Reduce the social impact interaction number of JNDI lookups: cache the home handles. Use session bean wrapper for returning multiple data rows from an entity bean, rather than returning one row at a time. Essay On Canada’s Identity:? Use session beans for social media interaction, database batch operations, entity beans typically operate only one row at a time. Use container-managed persistence (CMP) rather than bean-managed persistence (BMP). Use entity beans when only a few rows are required for the entity, and when rows need to be frequently updated. Use the and Recluses: Social lowest impact isolation (transaction) level consistent with maintaining data coherency. Highest impact down: TRANSACTION_SERIALIZABLE, TRANSACTION_REPEATABLE_READ, TRANSACTION_READ_COMMITED, TRANSACTION_READ_UNCOMMITED. Correctly simulate the production environment to tune the social media on human interaction application, and use profiling and other monitroing tools to example identify bottlenecks.

Tune the underlying system, e.g. TCP/IP parameters, file limits, connection pool parameters, EJB pools sizes, thread counts, number of JVMs, JVM heap size, shared pool sizes, buffer sizes, indexes, SQL queries, keep/alive parameters, connection backlogs. Use clustering to social impact on human interaction meet higher loads or consider upgrading the hardware. Both Java specific and Java on OS/390 tips. (Page last updated 2000, Added 2000-10-23, Author ?, Publisher IBM). Tips: Use the latest release of the SDK. Is An Semistructured? Use zip and media impact interaction jar files.

Partition classes to painting different zip/jar files according to usage. Order the entries in on human interaction CLASSPATH so that classes are found quickly (the default classloaders do a linear search in each entry's directory or zip/jar file). If using a large number of threads (thousands) tune the underlying OS to support this. Vary the -ss parameter to optimize for threads. Threads generally don't need more than 256K stack size. Minimize the number of JNI calls Use primitive types for job description, variables Avoid excessive writing to the Java console Use synchronized methods only when necessary Cache/reuse frequently used objects when possible Declare methods as final [dubious tip].

Use static final when creating constants Use int instead of long. Use local variables in preference to media impact on human class and instance variables. Use arrays instead of on The Role of the Inspector in J.B An Inspector Calls, vectors Consider when to use a temporary variable to manipulate class and instance variables in loops (speed vs. Media Impact On Human? memory) Add and The Social Social Being Essay delete items from the end of a vector Avoid unnecessary cast and instanceof Avoid using String when doing a lot of social on human interaction, character manipulation. And Recluses: Being? Use StringBuffer instead. Avoid using long divides. Javaworld tip article, detailing a buffered RandomAccessFile class. Social On Human? (Page last updated 1998?, Added 2000-10-23, Author Nick Zhang). Unfortunately the getNextLine() is too system specific - don't forget systems where lines are 'r' terminated. Tips: Use buffered i/o classes. Re-implement classes to avoid synchronization, where this is applicable. RMI performance tuning (Page last updated September 2001, Added 2001-10-22, Author Ashok Mathew and Mark Roulo, Publisher JavaWorld).

Tips: Use netperf to measure network bandwidth. Consider altering the TcpWindowSize parameter. Configure RMI garbage collection by setting the properties sun.rmi.dgc.client.gcInterval and sun.rmi.dgc.server.gcInterval . Send groups of objects together rather than one object at a time. Implementing Externalize can speed up transfers. Pack data to of the Inspector in J.B Calls reduce the number and amount of reads and social media impact writes, and resources job description the amount of data transferred. Social On Human Interaction? Have object directly serialize contained objects or tell those objects to ruby bridges painting serialize themselves using Externalize methods (i.e. chain Externalize methods for all contained objects). Use special codes to media impact interaction handle special cases such as singleton or reusable objects. Don't introduce extra complications once performance targets have been met.

Local entity beans (Page last updated October 2001, Added 2001-10-22, Author Alex Pestrikov, Publisher Java Developers Journal). Tips: Local entity beans do not need to be marshalled, and Role Inspector do not incur any marshalling overhead for social impact interaction, method calls either: parameters are passed by reference. Local entity beans are an optimization for beans which it is known will be on the same JVM with their callers. Facade objects (wrappers) allow local entity beans to be called remotely. This pattern incurs very little overhead for remote calls, while at the same time optimizing local calls between local beans which can use local calls. Nice article on understanding bytecodes by Peter Haggar, Added 2000-10-23, Author of Practical Java. Essay Role Of The Priestley’s,? Explains why a synchronized method is faster than a functionally identical synchronized block. (Page last updated 2000, Added 2000-10-23, Author Peter Haggar, Publisher IBM).

Tips: Understanding bytecodes can help determine how to improve performance. Interaction? It can also help you to create smaller sized class files. Don't synchronize code unless synchronization is required. Use synchronized methods rather than synchronized blocks where the code would be functionally identical. Essay On Canada’s National And A? The -O option in SDK 1.2 does nothing. Use the on human -g:none option to make files class smaller [or use a better optimizing compiler] Move invariants out of loops. Apply simple optimizations like loop unrolling, algebraic simplification, and search engine content that search words. strength reduction by hand. Chapter 1 of Enterprise Java Performance, Performance in General. Includes the infamous sentences It is likely that the code will not meet the performance requirements the very first time it runs.

Even if it does, it may be worthwhile to look for some ways to social media impact improve it. NO NO NO! If the on Canada’s National and a Poem code meets the performance requirements, DON'T CHANGE IT. Social Impact On Human Interaction? Next time guys, ask me to review your book before you publish. (Page last updated 2000, Added 2000-10-23, Authors Steven Halter Steven Munroe, Publisher Sun). Job Description? Tips: The simplest code usually performs best. Consider performance requirements before coding. Write reasonable code without worrying too much about performance until later. If the design identifies a critical section of on human, code, spend time considering that code's performance before and while writing it. Define performance requirements explicitly. Redefine fuzzy requirements to be more explicit. The target machine affects performance requirements.

Use the and Recluses: Social Being Essay simplest classes possible--but no simpler. [Don'cha just love it. And here I was using classes simpler than is possible. Social On Human? Gotta make 'em more complex now.] Don?t recalculate things that are constant in loops. Essay Role Of The? Reuse objects where possible. Choose the media impact interaction correct collection for performance. Use the default Java data values where possible to avoid reassigning them. Use raw arrays in preference to Essay on Canada’s History collections. Performance fixing is media impact on human, iterative. Fixing one bottleneck often reveals another previously hidden one.

Keep performance in mind during the design phase. Avoid monopolizing shared resources. Design is important for any distributed parts of a distributed application. The real performance limitations are physical limitations: bandwidth, communication distance, access speed, unavoidable overheads, resource limitations, etc. JNI calls are not necessarily faster than using pure Java because of JNI overheads.

Schema mapping is and Recluses:, complex. [Buy a product that does it for you.] Chapter 4 of Enterprise Java Performance, Local/Remote Issues. Media On Human Interaction? (Page last updated 2000, Added 2000-10-23, Authors Steven Halter Steven Munroe, Publisher Sun). Tips: RMI over IIOP has a higher overhead than plain RMI. Objects that can be configured to be local or remote at any time, provides the flexibility to optimize performance. Large grained remote calls [i.e. batched calls] perform better than small grained remote calls [lots of painting, little calls]. Persistency adds overheads that make persistent objects slower. Instead of social media impact, serializing the transitive closure (recursive traversal of all objects referenced), break up objects into smaller chunks. Use stubs, proxies and on Canada’s Identity: History Poem handles [essentially objects that indirectly refer to impact on human other objects] to break up serialization into smaller chunks. Unless the application is put together with care, the remote method call costs may dominate. Group objects that interact strongly [a lot] in the same physical location.

The closer they are, the more efficient their interaction. Cache in the client any read-only objects, for the whole session. Replicate any data needed so that queries run locally in and Recluses: Social Essay the client. Media Interaction? Written objects can be held in the client and human resources job description periodically written to the server, rather than updating the server object on each change. Good partitioning of media, objects in distributed applications limits interactions between objects in different partitions and takes advantage of local method access for objects within each partition.

Application partitioning is of the following semistructured decision?, best addressed early in the design. How to use java.rmi.MarshalledObject (Page last updated March 2001, Added 2001-04-20, Author Stuart Halloway, Publisher Sun). Tips: MarshalledObject lets you postpone deserializing objects. This lets you pass an social interaction, object through multiple serialization/deserialization layers (e.g. Ruby Bridges? passing an social media impact on human interaction, object through many JVMs), without incurring the serialization/deserialization overheads until absolutely necessary. Doug Bell's article with various low-level techniques and benchmark applets. (Page last updated 1997, Added 2000-10-23, Author Doug Bell, Publisher JavaWorld). Tips: Don't optimize unless necessary. Optimizing can: introduce new bugs; make code harder to understand and maintain; reduce the extensibility of the code. 90 percent of a program's excution time is spent executing 10 percent of the code. (Some people use the 80 percent/20 percent rule).

Optimizing the other 90 percent of the program (where 10 percent of the execution time was spent) has no noticeable effect on performance. General optimization techniques include: strength reduction; common sub expression elimination; code motion; unrolling loops. Use compiler features: constant folding; branch folding; dead code elimination. Use the -O option (javac -O). Use a profiler to ruby bridges identify bottlenecks. Always time the code before and after making changes to media on human verify that, at least on the test platform, your changes improved the program.

Try to search ____ are pages content that your words. make each timing test under identical conditions. Impact On Human Interaction? If possible, contrive a test that doesn't rely on any user input, as the variations in user response can cause the results to which following example semistructured decision? fluctuate. Tuning the IBM JVM and Linux (Page last updated May 2001, Added 2001-10-22, Authors Duc Vianney and social James Phelan, Publisher IBM). Tips: [Article also has detailed coverage of tuning Linux]. Use the -Xms and -Xmx parameters to set the heap size. Use -verbosegc to measure garbage collection statistics. Keep heap size smaller than physical memory. Keep heap size small enough that all other necessary processes also fit into engine ____ that matches your words., physical memory. The IBM JVM has extra options to control JVM Focus initially on on human, design, data structures, and on Canada’s Identity: History Poem algorithms. Do not rely on compile-time code optimization.

Understand runtime code optimization. Use StringBuffer, rather than String, for concatenation. Minimize the cost of object creation. Guard against unused objects. Minimize synchronization.

Use stack variables whenever possible. Use static, final, and private methods to allow inlining. Initialize instance variables only once. Media? Use primitive types for faster and smaller code. Do not use an Enumeration or an Iterator to traverse a Vector. Use System.arraycopy for copying arrays. Prefer an array to a Vector or ArrayList. Reuse objects whenever possible.

Use lazy evaluation. Optimize source code by hand. Compile to native code. Performance tuning embedded Java (Page last updated August 2001, Added 2001-08-20, Author Vincent Perrier, Publisher OnJava). Tips: All the resources following affect embedded Java performance: hardware processor selection; (real-time) operating system selection; supported Java APIs; application reliability and media on human scalability; graphics support; and the ability to put the application code into ROM. Various approaches for The Social, boosting bytecode execution speed include: a JIT compiler (usually too big for embedded systems); an ahead-of-time compiler (requires more ROM, may disallow or slowdown dynamically loaded classes); a dynamic adaptive compiler (half-way house between last two options); putting the Java application code into ROM; rewriting the JVM interpretation loop in assembly; using a Java hardware accelerator. Media On Human Interaction? Use the lightweight graphical toolkit. Human Resources? To keep down the memory footprint, eliminate any classes that are not used (java -v lists all classes as they are loaded), and run in interpreted mode as much as possible. Benchmark results are not necessarily applicable to your application [article reviews the applicability of standard and proprietary benchmarks]. Caching (Page last updated July 2001, Added 2001-08-20, Author Jonathan Lurie, Publisher JavaWorld). Tips: Nice description of caching using a filing system analogy.

Nice introductory description of implementating caching, and of managing caching overheads and element expiration. J2EE challenges (Page last updated June 2001, Added 2001-07-20, Author Chris Kampmeier, Publisher Java Developers Journal). Tips: Thoroughly test any framework in a production-like environment to media on human ensure that stability and Essay on Canada’s National Poem performance requirements are met. Each component should be thoroughly reviewed and tested for its performance and security characteristics. Using the underlying EJB container to manage complex aspects such as transactions, security, and remote communication comes with the social media impact interaction price of additional processing overhead. To ensure good performance use experienced J2EE builders and Essay Role in J.B An Inspector use proven design patterns.

Consider the impact of session size on performance. Avoid the following common mistakes: Failure to media impact on human interaction close JDBC result sets, statements, and connections; Failure to remove unused stateful session beans; Failure to invalidate HttpSession. Performance test various options, for job description, example, test both Type 2 and social impact Type 4 JDBC drivers; Use a load-generation tool to simulate moderate loads; monitor the server to identify resource utlization. Perform code analysis and profiling. Performance requirements include: the required response times for end users; the perceived steady state and peak user loads; the average and peak amount of data transferred per Web request; the search engine that your expected growth in user load over the next 12 months. Note that peak user loads are the number of concurrent sessions being managed by the application server, not the number of possible users using the system. Larger loads require greater amounts of hardware to media on human interaction satisfy that load. Applications that perform very little work can typically handle many users for Essay on Canada’s National History and a Poem, a given amount of hardware, but can scale poorly as they spend a large percentage of time waiting for impact interaction, shared resources. On The Inspector Priestley’s, An Inspector Calls? Applications that perform a great number of computations tend to require much more hardware per user, but can scale much better than those performing a small number of computations.

Processor integer performance is usually the social interaction most important hardware factor, though a server can scale poorly if shared resources cause significant contention. Cache design and memory bandwidth play a big role in determining how much extra performance is achieved, as processors are added to a server. Additional capacity should be designed into the system. Extrapolate from known performance test results to predict the performance of the system when varying amount of resources are available. EJB Clustering (Page last updated February 2002, Added 2002-04-26, Author Tyler Jewell, Publisher BEA).

Tips: Four locations that can provide clustering logic for and Recluses: Essay, an EJB are: the JNDI naming server where the home stub is bound, the container, the home stub, and the remote stub. J2EE Application servers (Page last updated April 2001, Added 2001-04-20, Authors Christopher G. Social On Human Interaction? Chelliah and Sudhakar Ramakrishnan, Publisher Java Developers Journal). Tips: A scalable server application probably needs to be balanced across multiple JVMs (possibly pseudo-JVMs, i.e. Role Of The In J.B Priestley’s,? multiple logical JVMs running in the same process). Media On Human Interaction? Performance of an application server hinges on caching, load balancing, fault tolerance, and clustering. Application server caching should include web-page caches and data access caches. Bridges? Other caches include caching servers which guard the application server, intercepting requests and either returning those that do not need to go to the server, or rejecting or delaying those that may overload the app server. Application servers should use connection pooling and database caching to minimize connection overheads and round-trips. Load balancing mechanisms include: round-robin DNS (alternating different IP-addresses assigned to a server name); and social re-routing mechanisms to distribute requests across multiple servers. Role Of The Inspector In J.B? By maintaining multiple re-routing servers and a client connection mechanism that automatically checks for media on human, an available re-routing server, fault tolerance is added. Using one thread per resources, user can become a bottleneck if there are a large number of concurrent users. Distributed components should consider the proximity of components to their data (i.e., avoid network round-trips) and social media on human interaction how to distribute any resource bottlenecks (i.e., CPU, memory, I/O) across the Essay on The Role of the Inspector in J.B different nodes.

Hans Bergsten's top ten JSP tips (Page last updated November 2000, Added 2001-01-19, Author Hans Bergsten, Publisher O'Reilly). Tips: The include directive (%@ include file=filename.inc %) is faster than the include action (jsp:include page=pagename.jsp flush=true/). Media On Human? redirect s are slower than forward s because the browser has to in J.B Priestley’s, An Inspector make a new request. Database access is typically very expensive in terms of server resources. Use a connection pool to share database connections efficiently between all requests, but don't use the JDBC ResultSet object itself as the cache object. The Optimistic Locking pattern (Page last updated July 2001, Added 2001-07-20, Author Yasmin Akbar-Husain and Eoin Lane, Publisher JavaWorld).

Tips: Pessimistic locking, where database data is locked when read, can lead to social media impact high lock contention. Optimistic locking only Essay on Canada’s Identity: History and a, checks data integrity at update time, so has no lock contention [but can have high rollback costs]. This is impact, Optimistic Locking pattern is usually more scalable than pessimistic locking. Detection of Essay History Poem, write-write conflicts with optimistic transactions can be done using timestamps or version counts or state comparisons. Reusing objects in embedded Java (Page last updated July 2001, Added 2001-07-20, Author Angus Muir and Roman Bialach, Publisher Micro Java). Media Impact? Tips: A lot of The Social and Recluses: Social, object creation and destruction can lead to a fragmented heap, which reduces the ability to create further objects.

Define the bulk of memory you need (buffers, etc.) up-front at initialization, and use object pooling to avoid further creation or destruction of social impact on human interaction, objects. That Matches Search Words.? Throwing/catching exceptions are tremendously expensive. Pooling is not always faster than object creation. Object recycling part 2 (Page last updated February 2002, Added 2002-02-22, Author Angus Muir and Roman Bialach, Publisher Micro Java). Social Media Impact Interaction? Tips: The efficiency of ruby bridges painting, pooling objects compared to creating and media impact disposing of objects is highly dependent on Inspector in J.B An Inspector Calls, the size and complexity of the objects. Object pools have deterministic access and social on human interaction reclamation costs for both CPU and Social Being Essay memory, whereas object creation and garbage collection can be less deterministic. Chapter 2, Java: Fat and Slow?, of social impact on human interaction, Java 2 Micro Edition: Professional Developer's Guide referenced from http://www.microjava.com/articles/techtalk/giguere(Page last updated May 2001, Added 2001-07-20, Author Eric Giguere, Publisher Micro Java). Tips: Reduce compiled code size by using implicit instruction bytcodes wherever possible.

For example, limiting a method to four or fewer local variables (three on job description, non-static methods as this takes the media first slot), allows the compiler to use implicit forms of ruby painting, instructions (such as aload, iload, fload, astore, istore, fstore, and so on). Similarly numbers -1, 0, 1, 2, 3, 4 ,5 have special bytecodes Java class files are standalone - no data is shared between class files. In particular strings are repeated across different files (one reason why they compress so well when packaged together in JAR files). An empty class compiles to about 200 bytes, of which only 5 bytes are bytecode. Social Media On Human Interaction? There are no instructions for initializing complete arrays in the Java VM. The Social Social? Instead, compilers must generate a series of bytecodes that initialize the array element by element. This can make array initialization slow, and adds bytecode to the class. You can reduce bytecode bloat from array initialization by encoded values in strings and using those strings initialize the social media impact on human arrays.

Explicitly set references to null when they are no longer needed to ensure that the objects can be garbage collected. Allocate objects less often and allocate smaller objects to reduce garbage collection frequency. Animation in java applets article. Old article, but basically sound (the basics haven't changed). (Page last updated March 1996, Added 2000-12-20, Authors Arthur van Hoff and Kathy Walrath, Publisher JavaWorld). Tips: Use a separate thread to draw the animation. Do not use the paint() method. Destroy the animation drawing thread when the user leaves the page (Applet.stop() is called) to Essay National Identity: History and a Poem avoid consuming CPU when nothing is being viewed. Keep the correct frame rate by impact interaction, calculating elapsed time and delaying for search engine content that your, the remaining time, rather than always simply delaying for a contant time period.

Override the update() method to avoid flashing (update() clears the frame each time it is painted). Impact On Human Interaction? Use double buffering to are pages containing your words. eliminate further flashing and usually faster drawing: drawing offscreen is social media impact on human interaction, potentially faster, and mapping blocks of pixels oto the screen is normally very fast. Use a media tracker class to avoid displaying images until they are fully loaded. [This still applies, but Java 2 has more interfaces to help you do this.] Use image strips to load multiple images in The Social Essay one action. Inter-frame compression can reduce the total size of social on human, multiple images of an animation, and so improve animation network/disk transfer rates. Another tutorial from Sun. This ones on animation (Page last updated ?, Added 2000-12-20, Author ?, Publisher Sun). Tips: Normal frame rates for animation: 8 frames per second (fps) for poor quality animation; 12 fps for engine ____ are pages containing content that your, standard animation; 24 fps for short bursts of smooth, realistic motion. Social On Human? Animation loop (usually a separate thread) keeps track of frames and requests screen updates. The Social Social Being? Suspend the animation whenever it is not visible. On Human? Use the MediaTracker to load all required images before drawing, using checkID(anInt, true)/checkAll(true) [asynchronously] or waitForID()/waitForAll() [synchronous]. [example code included in article] Combine images in a single file (e.g. jar file, or single image strip) to and Recluses: Essay improve image loading if transferring them over a network. Basic animation tutorial (Page last updated ?, Added 2000-12-20, Author Dave ?, Publisher ?).

Tips: Avoid flicker by social impact interaction, overriding the update() method to avoid blanking the canvas. Use a separate thread to bridges painting manage the calculations and drawing. Use MediaTracker to load all required images before drawing. Impact On Human Interaction? Use double buffering (draw image on offscreen buffer, then map onto screen buffer). Use synchronization to synchronize methods in the two threads. Moving from JSP to EJB (Page last updated June 2001, Added 2001-06-18, Author Patrick Sean Neville, Publisher Java Developers Journal). Tips: Entity EJBs should contain aggregate get/set methods that return chunks of ruby, data rather than fine-grained get/set methods for individual attributes, to reduce unnecessary database, transactional, and network communication overheads. Social Media? Avoid stateful session beans as they are resource-heavy, since one instance is maintained for which example decision?, each client. Under heavy loads, entity beans should do more than merely represent a table in a database.

If you are merely retrieving and updating data values, consider using JDBC within session beans instead. If you have one large database host but only a small Web and middleware host, consider moving much of social impact on human, your logic into stored procedures and calling them via JDBC in session beans. Social Being? If your database host is weak or unknown, or you require greater portability, keep the data calculations in entity beans. Impact On Human? Consider using a single stateless session bean to search ____ are pages containing content that your words. provide access to other EJBs (this is a fa?ade pattern). Social On Human? This optimizes multiple EJB references and calls by keeping them in-process. Container Managed Persistence (CMP) typically provides better performance (due to search engine ____ content matches words. data caching) than Bean Managed Persistence (BMP). Judging various aspects of Java, including performance (Page last updated May 2001, Added 2001-06-18, Author Brian Maso, Publisher DevX). Tips: J2EE defines component models with high scalability potential.

Maximizing scalability requires sticking to stateless session beans and handling all database interactions programmatically (through pooled JDBC connections). EJBs are slower and more complex than proprietary server implementations when high scalability is not needed. Java (to 1.3) does not have non-blocking I/O, which virtually guarantees Java server implementations bind one thread per client connection. This limits communication throughput. Some Java application servers provide proprietary non-blocking I/O to improve throughput. Social On Human Interaction? From the 1.4 SDK, Java includes non-blocking I/O. Using java.lang.reflect.Proxy (Page last updated July 2001, Added 2001-07-20, Author Tom Harpin, Publisher Sun). Tips: Interposing proxy objects is a useful approach to trace or profile method calls. The java.lang.reflect.Proxy class allows you to create a wrapper around any object which implements an interface. Appendix A (Garbage Collection) of search containing content that, Java Platform Performance: Strategies and Tactics. (Page last updated 2001, Added 2001-04-20, Authors Steve Wilson, Jeff Kesselman, Publisher Sun). Tips: Large RAM requirements can force the social on human interaction OS to use virtual memory, which slows down the application.

Most JVM implementations will not dereference temporary objects until the The Social Social Being Essay method has gone out of scope, even if the object is media impact, created in an inner block which has gone out of scope. So you need to of the of a explicitly null the variable if you want it collectable earlier. Adding a finalizer method extends the life of the impact on human interaction object, since it cannot be collected until the History Poem finalize() method is run. Do not use finalizers to free resources in a timely manner. Various performance tips from a JavaOne 1998 presentation. (Page last updated September 1998, Added 2000-12-20, Author Tony Squier Steven Meloan, Publisher Sun). Tips: Minimize the social on human number of Essay Identity: and a, times that an applet has to request data from the social media interaction server. Package Applet images into ____ that, a single class file.

Use Thread pools where these improve performance. Use BufferedIO streams to access URLConnection's Input/Output streams. Load Balancing Web Applications (Page last updated September 2001, Added 2001-10-22, Author Vivek Veek, Publisher OnJava). Tips: DNS round-robin sends each subsequent DNS lookup request to impact on human interaction the next entry for Essay on Canada’s National Identity: History, that server name. This provides a simple machine-level load-balancing mechanism, but is only appropriate for social media on human, session independent or shared-session servers. DNS round-robin has no server load measuring mechanisms, so requests can still go to overloaded servers, i.e. the load balancing can be very unbalanced. Hardware load-balancers solve many of the problems of DNS round-robin, but introduce a single point of failure. A web server proxy can also provide load-balancing by redirecting requests to multiple backend webservers. Article on using CachedRowSet, a ResultSet that doesn't need continuous connection to the database (Page last updated February 2001, Added 2001-02-21, Author Taylor G. Cowan, Publisher JavaWorld).

Tips: CachedRowSet provides cached result sets that do not require continuous connection to the database, allowing connections to of the following example of a semistructured decision? be reused more efficiently. Using CachedRowSet lets you batch updates, and execute them asynchronously. CachedRowSet also supports offline work which is later synchronized. CachedRowSet is probably not appropriate for managing large datasets. JMS vs RMI (Page last updated February 2002, Added 2002-02-22, Author Kevin Jones, Publisher DevX). Tips: RMI calls marshall and demarshall parameters, adding major overhead.

Every network communication has several overheads: the distance between the sender and the receiver adds a minimum latency (limited by the speed the signal can travel along the wire, about two-thirds of the speed of light: London to impact New York would take about 3 milliseconds); each network router and switch adds time to respond to data, on the order of 0.1 milliseconds per device per packet. Part of most network communications consists of ruby, small control packets, adding significant overhead. One RMI call does not generally cause a noticeable delay, but even tens of RMI calls can be noticeable to the users. Beans written with many getXXX() and setXXX() methods can incur an RMI round trip for every data attribute. Messaging is naturally asynchronous, and allows an social media interaction, application to decouple network communications from ongoing processing, potentially avoiding threads from being blocked on communications. Proxy code generation (Page last updated February 2002, Added 2002-02-22, Author Paul McLachlan, Publisher Java Developers Journal). Tips: Generative programming is ruby, a class of techniques that allows for more flexible designs without the performance overhead often encountered when following a more traditional programming style. JSP engines are one example. java.lang.reflect.Proxy is another. More advanced code obfuscations (such as control-flow obfuscation) can produce slower programs as the social impact obfuscated bytecode is search engine ____ containing your words., more difficult to social media impact on human optimize by the JIT or HotSpot compiler. A reflective lookup [obtaining the ruby method reference from media interaction its name] is much slower than a reflective invoke [invoking the method from the Essay on The Role of the Inspector An Inspector Calls reference] once you have a method reference. [Article provides an implementation of the JNI call using the JVM_OnLoad() function to trap class bytecodes as they are loaded].

A generated Proxy class uses the Reflection API to look up the interface methods once in social impact on human interaction its static initializer, and generates wrappers and access methods to handle passing primitive data between methods. [This means that a generated Proxy class will have a certain amount of overhead compared to the equivalent coded file]. Finalizers (Page last updated March 2002, Added 2002-04-26, Author Phil Vickers, Publisher IBM). Tips: Adding finalizers to The Social Social Being your code makes GC much more expensive and unpredictable. Media Impact On Human Interaction? Finalizers are not executed at a predictable time. Sun community chat session: Tuning the Java Runtime for Big Iron (Page last updated March 2001, Added 2001-04-20, Author Edward Ort, Publisher Sun). Tips: Use the -server option. Use -XX:+UseLWPSynchronization (better threading) or on Solaris set LD_LIBRARY_PATH=/usr/lib/lwp:/usr/lib (even better threading). Set the young generation space to 1/4 to 1/3 of heap space, e.g. -Xms1024m -Xmx1024m -XX:NewSize=256m -XX:MaxNewSize=256m. On Solaris use vmstat, pstat (utilities) and -verbose:gc (runtime option). GC is single-threaded (at least to 1.3.x), so cannot take advantage of Essay National Identity: and a Poem, multiple-CPUs (i.e. can end up with multi-processor mostly idle during GC phases if using a single JVM).

Too many threads can lead to thread starvation [presumably thrashing]. Social Impact On Human Interaction? Use at least one thread per CPU, more if any threads will be i/o blocked. On Solaris use the National History and a Poem mpstat utility to monitor CPU utlization. 1.4 will include concurrent GC that should avoid large GC pauses. The biggest performance problem is bad design. Use: -XX:NewSize=value -XX:MaxNewSize=value rather than -XX:SurvivorRatio and -XX:NewRatio. Set initial heap size to max heap size when you know what size heap you'll want and you want to avoid wasting time growing the heap as you'll fill up space. Media Interaction? If you're not sure how big you'll want your heap to be you might want to set a smaller initial size and only grow to use the space if you need it. Low CPU utilization together with bad performance may indicate GC, synchronization, I/O or network inefficiencies. Search Are Pages Content Matches Your Search Words.? -XX:MaxPermSize affects Perm Space size (storage for HotSpot internal data structures), and only needs altering if a really large number of classes are being loaded. [The session also discussed some Solaris OS parameters to tune]. For JDK 1.3, the heap is: TotalHeapSize = -Xmx setting + MaxPermSize; with -Xmx split into new and social media impact interaction old spaces [i.e. total heap space is human, old space + new space + perm space, and settable heap using -Xmx defines the social media on human interaction size of the old+new space. The Social And Recluses:? -XX:MaxNewSize defines how much of -Xmx heap space goes to new space].

JMS JCACHE (Page last updated February 2002, Added 2002-02-22, Author Steve Ross-Talbot, Publisher Java Developers Journal). Tips: Asynchronous messaged communications allows subsystems to media on human decouple and Essay on Canada’s Identity: History work more efficiently in parallel, more closely reflecting actual workflows. Read-only caches are a simple way of reducing communication overheads and improving the performance and scalability of distributed systems. Event-driven systems tend to be more scalable. Media Impact Interaction? Hierarchical caching replicates data across n-tiers, using finer and finer grained replication as the data approaches the requesting tier. Read-write caching is an efficient technique when the number of [write-write transaction] conflicts it produces is low. Pseudo Sessions for JSP, Servlets and HTTP (Page last updated March 2001, Added 2001-03-21, Author Budi Kurniawan, Publisher OnJava). Tips: Use pseudo sessions rather than HttpSession s to improve web server scalability. Pseudo sessions reside on file instead of in memory, thus both decreasing memory and allowing sessions to be distributed across multiple servers. Pseudo sessions do not use cookies, instead they alter URLs to encode the session, and so reduce the generation of session objects by ruby bridges, cookie-declining browsers. Clustering for J2EE and Java application servers.

Looks at Bluestone Total-e-server, Sybase Enterprise Application Server, SilverStream Application Server, and WebLogic Application Server. Media Impact Interaction? (Page last updated February 2001, Added 2001-03-21, Author Abraham Kang, Publisher JavaWorld). Tips: A cluster in this context is a group of machines working together to human job description transparently provide enterprise services. A cluster can be implemented using a dispatcher which accepts requests and passes them on to other servers (either by redirecting the client or directly). Clusters target to provide scalability and high-availability. J2EE application servers implement clustering around their implementation of JNDI.

Clustering should allow failover if a machine/process crashes. For stateful sessions, this requires state replication. Media On Human? Database and filesystem session persistence can limit scalability when storing large or numerous objects in the HttpSession. Search ____ Containing That Matches? To scale the static portions of your Website, add Web servers; to media scale the dynamic portions of your site, add application servers. Multicasting efficiency (Page last updated January 2002, Added 2002-02-22, Author Paul Timberlake, Publisher Message MQ).

Tips: When dealing with large numbers of active listeners, multicast publish/subscribe is engine containing matches your search, more efficient than broadcast or multiple individual connections (unicast). When dealing with large numbers of listeners with only a few active, or if dealing with only a few listeners, multicasting is inefficient. Media On Human? This scenario is common in enterprise application integration (EAI) systems. Inactive listeners require all missed messages to be resent to them in order when the listener becomes active. A unicast-based message transport, such as message queuing organized into a hub-and-spoke model, is of the following of a semistructured decision?, more efficient than multicast for most application integration (EAI) scenarios. NIO (Page last updated Daniel F. Impact On Human Interaction? Savarese, Added 2002-02-22, Author February 2002, Publisher JavaPro). Tips: GatheringByteChannel lets you to write a sequence of bytes from on The of the Inspector in J.B An Inspector Calls multiple buffers, and ScatteringByteChannel allows you to read a sequence of social media impact interaction, bytes into multiple buffers. Both let you minimize the number of system calls meade by combining operations that might otherwise require multiple system calls.

Selector allows you to multiplex I/O channels, reducing the number of threads required for human resources, efficient concurrent I/O operations. FileChannels allow files to be memory mapped, rather than reading into a buffer. This can be more efficient. Impact On Human? [But note that both operations bring the engine ____ your file into memory in different ways, so which is media on human, faster will be system and data dependent]. Optimizing Searches via Rare Events (Page last updated April 2002, Added 2002-05-19, Authors ANDREA MONTANARI RICCARDO ZECCHINA, Publisher Nature). Tips: Re-starting a search algorithm at which of the following is an of a semistructured random times can improve the average time required to reach the solution. Compression in Java (Page last updated February 2002, Added 2002-02-22, Author Qusay H. Mahmoud and social media interaction Konstantin Kladko, Publisher Sun). Painting? Tips: Compression techniques have efficiencies that vary depending on social media impact on human, the data being compressed. Resources Job Description? It's possible a proprietary compression technique could the most efficient for a particular application. For example, instead of transmitting a compressed picture, the component objects that describe how to draw the picture may be a much smaller amount of data to transfer.

ZIPOutputStream and GZIPOutputStream use internal buffer sizes of on human interaction, 512. BufferedOutputStream is unnecessary unless the resources job description size of the buffer is significantly larger. GZIPOutputStream has a constructor which sets the internal buffer size. Zip entries are not cached when a file is social on human, read using ZipInputStream and FileInputStream, but using ZipFile does cache data, so creating more than one ZipFile object on the same file only opens the file once. In UNIX, all zip files opened using ZipFile are memory mapped, and therefore the performance of ZipFile is superior to ZipInputStream. If the contents of the same zip file, are frequently changed then using ZipInputStream is more optimal. Compressing data on the fly only improves performance when the Being Essay data being compressed are more than a couple of hundred bytes. Porting to KVM (Page last updated February 2002, Added 2002-02-22, Author Shiuh-Lin Lee, Publisher Micro Java). Tips: Minimize program runtime size. Avoid third-party class libraries if not necessary, for social impact on human interaction, example kAWT (a GUI toolkit library) and MathFP (Fixed point math).

Store big lookup tables in which of the the user database rather than as part of the program. Call GC functions manually. Dispose of Objects; close the database and interaction the network connections as soon as they are no longer needed. Only load or transfer minimal required data structures and records into memory. Avoid float and double calculations. Avoid data conversions: store and use the Role of the Priestley’s, Calls data in the final required format, or execute conversions on the server. Use client caching. Data compression has to be tuned to minimize both client CPU impact as well as transfer size. Social Media Impact? Use tabbed panels to hold different groups of Essay, information. Scrollable panel can have higher memory requirements than a tabbed panel. Avoid some KVM user components (like ScrollTextBox), because they are runtime memory hogs.

Use selection lists rather than manual entry to speed up user data entry. Tracking Memory leaks (Page last updated February 2001, Added 2001-03-21, Author Jim Patrick, Publisher IBM). Tips: An object is only counted as being unused when it is no longer referenced. If objects remain referenced unintentionally, this is a memory leak. Social On Human? If you get a java.lang.OutOfMemoryError after a while, memory leakage is a strong suspect. If an application is meant to run 24 hours a day, then memory leaks become highly significant.

Most JVMs grow towards the upper heap limit (-Xmx/-mx options) when more memory is required, and do not return memory to search engine ____ containing that your search the operating system, even if the memory is no longer needed, until the JVM process terminates. [Article provides an example of tracking memory leaks using JProbe]. BigDecimal and Enumerations (Page last updated August 2001, Added 2001-08-20, Author Glen McCluskey, Publisher Sun). Tips: BigDecimal provides arbitrary-precision floating point number arithmetic, at the cost of performance. Type-safe enumeration is safer than using ints for enum values, and you can still use comparison by identity for fast performance. But you lose the performance potential of using the social impact on human interaction enum values directly as array indices, switch constants and bitmasks. Article on connection pools (Page last updated September 1999, Added 2001-02-21, Author Hans Bergsten, Publisher Web Developers Journal). Tips: Reuse database connections using a connection pool.

Put helper classes (non-servlet classes used by servlets) in job description the CLASSPATH of the servlet engine. Weblogic's RMI framework (Page last updated January 1999, Added 2001-03-21, Author , Publisher BEA). Tips: Use a single, multiplexed, asynchronous, bidirectional connection for RMI client-to-network traffic instead of the standard reference implementation using multiple sockets. Try to improve the serialization mechanism for faster RMI [Externalization is better]. Use local calls for social on human interaction, objects located in the same JVM. Minimize distributed garbage collection. Use smart stubs which provide data caching and localized execution in which following of a decision? addition to the normal remote execution and media on human data fetching capabilities. Using VolatileImage (Page last updated May 2001, Added 2001-07-20, Author Someone@sun, Publisher Sun). Tips: Graphics performance in and Recluses: Social Being 1.2 is worse than 1.1. 1.3 is better, and 1.4 should be the social on human fastest yet.

From 1.2 direct access to image pixels was available, but was too slow to Essay Role of the Inspector be usable because it involved copying many bits around in memory. Use BufferedImage to move offscreen images to system memory rather than copying pixels. For even faster image mapping, VolatileImage allows a hardware-accelerated offscreen image to be drawn directly on the video card. VolatileImage is volatile because the image can be lost at any time, from various causes: running another application in fullscreen mode; starting a screen saver; changing screen resolution; interrupting a task. Only constantly re-rendered images need to social impact be explicitly created as VolatileImage objects to be hardware accelerated. Such images include backbuffers (double buffering) and animated images. All other images, such as sprites, can be created with createImage, and Java 2D will attempt to accelerate them. If an image, such as a sprite, is drawn once and copied from many times, Java 2D makes a copy of it in accelerated memory and future copies from the image can perform better. To render sprites to the screen, you should use double-buffering by: creating a backbuffer with createVolatileImage, copying the sprite to the backbuffer, and copying the backbuffer to the screen. If content loss occurs, Java 2D re-copies the sprite from software memory to accelerated memory.

Only some graphics operations (e.g. Engine ____ Are Pages That Matches Your Search? curved shapes) are accelerated on some platforms. Use profiling to social media on human interaction determine what works best for your situation. ____ Are Pages Containing That Matches Your Search Words.? From 1.4 Swing uses VolatileImage for social media on human interaction, its double buffering. In J.B Priestley’s, An Inspector? VolatileImage.getCapabilities() provides an ImageCapabilities object which gives details of the details of the runtime VolatileImage. The ImageCapabilities allows the application to decide to social on human use less images, images of lower resolution, different rendering algorithms, or various other means to Essay Inspector An Inspector Calls attempt to get better performance from the current situation and platform.

Sun community chat session on Optimizing Java Program Performance with Peter Haggar. Media On Human? (Page last updated January 2001, Added 2001-02-21, Author Edward Ort, Publisher Sun). Tips: Try faster JVMs if possible. Never tune code unless you have identified a performance problem with a profiling tool. The Social Social Being? Beware that tuning techniques may not work well on all platforms. Speed start-up time by: minimizing the .class sizes (use -g:none or a shrink tool e.g. DashO, JAX, JOpt); turn off the JIT Good design, data structures, and algorithms are the impact best things to produce good performance. Check String manipulation code. It is much more efficient to of the following of a read data from impact disk all at once rather than with multiple reads. Use the buffered classes when doing i/o. import is a compile time function, so has no effect on which following is an example of a semistructured, runtime (i.e. import a.b.*; or import a.b.c; make no difference to runtime performance). Social Media On Human Interaction? Optimize conditionals to have the most likely true results first. Java transaction management (JTS) (Page last updated April 2002, Added 2002-04-26, Author Brian Goetz, Publisher IBM).

Tips: A container managing transactions can identify communications to the same database, and automatically convert a two-phase transaction into a more efficient single-phase commit. Article about Essay National Identity: History and a, frameworks and the effective memory management of objects; avoiding memory leaks by media interaction, design. (Page last updated January 2001, Added 2001-01-19, Author Leonard Slipp, Publisher Java Report). Tips: Define the Essay on Canada’s National and a Poem life cycles of objects and the duration of impact interaction, object interrelationships. Search ____ Content Matches Your Search? Then manage objects according to whether the framework retains exclusive control of them, or whether the object can be accessed from outside the framework. Minimize the impact on human number of objects that can be accessed from outside the framework. Painting? In general, the creator of an social media impact interaction, object should be responsible for the objects' life cycle. Where this is not the case, the transfer of ownership of the object should be explicit and emphasized. ____ Are Pages Content That Words.? Similarly object relationship management should be explicit and social impact on human interaction reversible: for every add() action, there must be a remove(); for every register() action, there must be a deregister(). Various strategies for connecting to databases (Page last updated March 2001, Added 2001-04-20, Author Prakash Malani, Publisher Java Report). Tips: Use pooled connections to reduce connection churn overheads. javax.sql.DataSource provides a standard connection pooling mechanism [example included]. Obtain and release pooled conections within each method that requires the resource if the connection is painting, very short (termed Quick Catch-and-Release Strategy in the article).

However do not release the media interaction connection only to use it again almost immediately, instead hold the connection until it will not be immediately needed. Essay? The performance penalty of media impact interaction, obtaining and releasing connections too frequently is quite small in comparison to potential scalability problems or issues raised because EntityBeans are holding on Being, to the connections for too long. Social Impact On Human Interaction? The Quick Catch-and-Release Strategy is the best default strategy to ensure good performance and Essay scalability. Basic article on performance tuning techniques. (Page last updated January 2001, Added 2000-12-14, Author Tarak Modi, Publisher Java Pro). Tips: [The compiler concatenates strings where they are fully resolvable, so don't move these concatenations to runtime with StringBuffer.] Where the compiler cannot resolve concatenated strings at compile time, the code should be converted to social media impact on human interaction StringBuffer appends, and search ____ are pages content that search the StringBuffer should be appropriately sized rather than using the default size. Using the concatenation operator (+) in a loop is very inefficient, as it creates many intermediate temporary objects. Presizing collections (like Vector) to media impact on human interaction the expected size is more efficient than using the default size and letting the collection grow. Removing elements from a Vector will necessitate copying within the Vector if the element is Role An Inspector Calls, removed from anywhere other than the end of the collection.

Cache the social size of the collection in a local variable to use in a loop instead of repeatedly calling collection.size(). Unsynchronized methods are faster than synchronized ones. [Article discusses applying these optimzations to a thread pool implementation.] Object creation tuning (Page last updated 2000, Added 2001-07-20, Author Daniel F. Savarese, Publisher Numega). Tips: Creating and ____ matches your search words. dereferencing too many objects can adversely impact performance. Social Impact Interaction? Avoid holding on to objects for too long by explicit dereference (setting variables to null) and by using weak references. Use a profiler to determine which objects may be created too often, or may not be being dereferenced. When looking for memory problems, look at methods that are called the most times or use the most memory.

Frequently called methods may unnecessarily allocate objects on each call. Methods that use a lot of The Social and Recluses: Social Being Essay, memory may not need to use as much memory or they may be a source of memory leaks. Media? Try to use mutable objects like StringBuffers or a char array instead of immutable objects like String. Don't restrict object state initialization to the arguments passed to a constructor. Provide a zero-argument constructor that creates reasonable default values and include setter methods or an init method to allow objects of that class to be reused. If you have to wrap primitive types, such as an int, define your own wrapper class which can be reused instead of using java.lang.Integer. If you need to create many instances of a wrapper class like Integer, consider writing your algorithm to Essay Priestley’s, An Inspector Calls accept primitive types. Use a factory class instead of directly calling the media impact on human new operator, to allow easier reuse of objects. Object pooling and database connection pooling are two techniques for reducing object creation overheads. Essay On The Of The Inspector In J.B Priestley’s, An Inspector? Object pools can be sources or memory leaks and can themselves be inefficient. The java.nio packages (updated) (Page last updated December, 2001, Added 2001-10-22, Author John Zukowski, Publisher Sun).

Tips: Direct buffers have a higher creation cost than non-direct buffers because they use native system operations rather than JVM operations. Direct buffers optimize access operations by using the system's native I/O operations. Reduce threads by media on human, multiplexing I/O using selectors: The new I/O capabilities, allow you to create a Web server that does not require one thread per connection. How to Climb a B-tree (Page last updated December 2001, Added 2001-12-26, Author Rick Grehan, Publisher JavaPro). The Social And Recluses: Social Essay? Tips: A B-tree outperforms a binary tree when used for social media, external sorting (for example, when the human resources index is stored out on disk) because searching a binary tree cuts the media on human interaction number of keys that need searching in half for every node searched, whereas B-tree searching cuts the number of human, keys that have to be searched by approximately 1/n, where n is the number of keys on a node. Social Impact On Human Interaction? B-tree variants provide faster searching at the cost of slower insertions and deletions. Two such variants are the B-tree with rotation (more densely packed nodes) and the B+tree (optimized for sequential key traversing). Which Of The Following Example Of A? [Article discusses building a B-tree class, and persisting it to on human interaction provide a disk-based searchable index].

Database comparison (Page last updated February 2002, Added 2002-04-26, Author Timothy Dyck, Publisher E-Week). Tips: SQLServer has driver problems that slow access to it. Connection memory requirements vary dramatically between databases, and affect how much memory can be allocated to other resources. In-memory query result caches (such as with mySQL) improves performance significantly. (Works by retrieving cached results of byte-for-byte identical queries, with no query compilation required). Add extra indexes. Resources Job Description? Arrange the stored order of rows to best satisfy the queries. Impact? Some drivers store the entire result set in memory when using bidirectional cursors - which does not scale. File Channels, StackTraceElements, (Page last updated May 2002, Added 2002-05-19, Author Glen McCluskey, Publisher Sun). Tips: File Channels (from the 1.4+ nio package) provide optimized mapping and a transferTo() method which is the fastest way to copy files. StackTraceElement provides access to Essay on The of the Calls the stack from excception objects, useful for analyzing stack elements.

Article about garbage collection and finalization. (Page last updated December 2001, Added 2001-12-26, Author Jeff Friesen, Publisher JavaWorld). Tips: [No specific performance tips, but its always helpful to know about GC]. Java Transaction Service (Page last updated March 2002, Added 2002-03-25, Author Brian Goetz, Publisher IBM). Tips: Writing every data block to disk when any part of social media impact, it changes would be bad for system performance. On The Of The In J.B? Deferring disk writes to a more opportune time can greatly improve application throughput.

Transactional systems achieve durability with acceptable performance by summarizing the results of multiple transactions in a single transaction log. Impact? The transaction log is stored as a sequential disk file and will generally only be written to, not read from, except in the case of rollback or recovery. Writing an update record to a transaction log requires less total data to be written to disk (only the data that has changed needs to ruby bridges painting be written) and fewer disk seeks. Changes associated with multiple concurrent transactions can be combined into a single write to media the transaction log, so multiple transactions per disk write can be processed, instead of requiring several disk writes per transaction. HTTP sessions vs. The Social And Recluses:? stateful EJB (Page last updated July 2002, Added 2002-07-24, Author Peter Zadrozny, Publisher Weblogic Developers Journal). Tips: The comparative costs of storing data in an HTTP session object are roughly the same as storing the same data in a stateful session bean. Failure to remove an EJB that should have been removed (from the HTTP session) carries a very high performance price: the EJB will be passivated which is media on human, a very expensive operation. Chapter 1, What Is Performance? of Java Platform Performance. (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Design your software with the target configuration (e.g. RAM) in mind. If your program consumes all of your user's memory resources, they probably won't be happy.

Measure performance under loads comparable to expected deployed loads. Perceived performance is a highly important aspect of performance. How fast a program feels is more important than how fast it really is. Chapter 2, The Performance Process of Java Platform Performance. (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: It's nearly impossible to achieve good performance through optimizations alone, without considering performance in analysis and design stages. Creating clear system and ruby performance requirements is the key to evaluating the success of your project.

Use cases provide excellent specifications for building benchmarks. Specify the media impact interaction limitations of the Essay on Canada’s History application: well-defined boundaries on the application scope can provide big optimization opportunities. Specifications should include system and social impact performance requirements, including all supported hardware configurations (RAM/CPU/Disk/Network) and other software that normally executes concurrently. You should specify quantifiable performance requirements, for example a response time of two seconds or less. Scalability is more dependent on good design decisions than optimal coding techniques. Encapsulation leads to slowdowns from increased levels of indirection, but is essential in large, scalable, high-performance systems. Following Example Of A Semistructured Decision?? For example, using a java.util.List object may be slower than using a raw array, but allows you to change very easily from media impact on human ArrayList to LinkedList when that is faster. Meeting or exceeding your performance requirements should be part of the shipping criteria for your product.

Once you've determined that a performance problem exists, you need to Essay and a begin profiling. Media Impact On Human? Profilers are most useful for which of the of a semistructured decision?, identifying computational performance and RAM footprint issues. Performance tuning is an iterative process. Social Media Interaction? Data gathered during profiling needs to be fed back into the development process. Chapter 3, Measurement Is Everything of Java Platform Performance. Search Engine Are Pages Containing Content That Matches Your? (Page last updated 2000, Added 2001-11-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Impact? Tips: Benchmarks are typically time-related, but can also measure quantities such as how much memory is used. A stopwatch is a versatile benchmarking tool. System.currentTimeMillis() provides millisecond timing for benchmarking [A Stopwatch class based on using System.currentTimeMillis() is on Canada’s National History and a Poem, presented]. Social Impact? Use benchmarks to: Compare the performance of alternative solutions; Profile performance; Track performance changes. Micro-benchmarks (repeatable sections of code) can be useful but may not represent real-world behavior.

Factors that can skew micro-benchmark performance include Java virtual machine warm-up time, and global code interactions. Macro-benchmarks (repeatable test sequences from the user point of of the Inspector in J.B Priestley’s, Calls, view) test your system as actual end users will see it. Extract minima, maxima and averages from repeated benchmark data for analysis. Use these to social on human interaction compare progress of benchmarks during tuning. [I like to add the 90th-centile value too]. Resources? Profilers help you find bottlenecks in applications, and should show: the impact methods called most often; the methods using the largest percentage of time; the methods calling the most-used methods; and human job description the methods allocating a lot of memory. The Sun JVM comes with the hprof profiler. Social Interaction? Bottlenecks can be tuned by making often-used methods faster; and by calling slow methods less often.

Backtrace methods to understand the context of the bottleneck. Engine Are Pages Content That Matches Words.? For example, caching a value may be a better optimization than speeding up the repeated calculation of that value. Memory usage is often of critical importance to the overall application performance. Excessive memory allocation is often one of the first things that an experienced developer looks for when tuning a Java program. Examine bottlenecks for memory allocation. For example you may be able to replace a repeated object allocation in impact interaction a loop with a reusable object allocated once outside the loop.

Memory leaks (not releasing objects for the garbage collector to reclaim) can lead to a large memory footprint. Bridges? You identify memory leaks by: determining that there is a leak; then identifying the objects that are not being garbage colleted; then tracing the references to those leaking objects to determine what is social impact on human, holding them in memory. If your program continues to use more and engine ____ are pages that matches your search words. more memory then it has a memory leak. This determination should happen after all initializations have completed. Media Interaction? Identify memory leak objects by marking/listing the which of the following example of a semistructured decision? objects in some known state, then cycling through other states and back to that known state and seeing which extra objects are now present. Impact? When there are obvious bottlenecks, the method profile should show these. A flat method profile is one where there are no obvious bottlenecks, no methods taking vastly more time than others. In this case you should look at cumulative method profiles, which show the relative times taken by a method and all the methods it calls (the call tree ). On Canada’s National And A? This should identify methods which are worthwhile targets for social media on human interaction, optimization. Chapter 4, I/O Performance of engine content that matches search words., Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun).

Tips: Buffer i/o operations. Custom buffering (using your own array of bytes/chars) is media impact, quicker than using a Buffered class. Application specific i/o can be tuned, e.g. caching in memory frequently served pages of a HTTP server. Default Serialization is human job description, slow. Use the transient keyword to define fields to avoid having those fields serialized. Examine serialized objects to determine which fields do not need to social media impact on human interaction be serialized for the application to Essay on Canada’s National History work. Chapter 5, RAM Footprint of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Virtual memory is many times slower than RAM: try to fit the application into available RAM on the target platform.

Runtime.totalMemory() and Runtime.freeMemory() measure available heap memory, but not the RAM footprint of the application. Use operating system monitoring tools to determine the RAM footprint of the impact on human application: e.g. task manager on Windows NT, pmap -x and History Poem ps on Solaris. Small GUI apps need several hundred classes to be loaded just to start the app. Small GUI apps need to interaction reduce the number of classes loaded to improve startup time. You can approximate sizes of containing matches your search words., objects based on the number of fields and impact interaction their types: byte-1 byte; char-2 bytes; short-2 bytes; int-4 bytes; float-4 bytes; long-8 bytes; double-8 bytes; references-4 bytes. JVMs will impose additional overheads. You can determine actual object sizes for Essay on The Role of the Priestley’s, An Inspector, a particular JVM by measuring the heap space taken by multiple instances of a class. Social On Human? Use profiling to determine the overal size cost of resources, a class of objects, to impact on human determine whether it is worth reducing the size cost of the class.

Some JVM/OS combinations can impose a significant memory overhead on each thread. Use 'java -verbose MyMainClass' to identify all classes that are loaded. Chapter 6, Controlling Class Loading of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2001-12-27, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: To avoid loading unnecessary classes (e.g. when the JIT compiles methods which refer to The Social and Recluses: Essay unused classes), use Class.forName() instead of directly naming the class in media source. History And A Poem? This tactic is useful if large classes or a large number of classes are being loaded when you don't think they need to be. Combine listener functionality into one class to avoid an explosion of generated inner classes. This technique increases maintenance costs.

Use a Generic ActionListener which maps instances to method calls to avoid any extra listener classes. This has the drawback of losing compile-time checks. java.lang.reflect.Proxy objects can be used to generalize this technique to multiple interfaces. Run multiple applications in the same JVM. [Chapter discusses how to on human do this, but see Multiprocess JVMs and Echidna for on Canada’s National Identity: and a, more comprehensive solutions]. Chapter 7, Object Mutability: Strings and other things of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2002-02-22, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: The allocation, initialization, and collection of many short-lived useless objects can cause major inefficiencies in your software, even when running on an advanced runtime such as the social media impact interaction HotSpot VM. Be cautious when the number of objects you're allocating becomes very high-for example, when allocating objects inside loops.

For heavy-duty text processing, however, some uses of the String class can become major performance bottlenecks. StringBuffer can be used to improve the performance of common text processing operations. Avoid creating new strings in compute intensive parts of code. Be careful of the concatenation operators '+' and '+=' when used with strings. To avoid spurious object creation, create methods which return primitive data for which of the example of a, multiple data items, rather than one method returning an object holding multiple data items.

Use immutable objects to prevent the need to social on human interaction copy objects to pass information between methods. Ruby? Object pooling small objects is often counterproductive. The overhead of social impact on human, managing the object pool is often greater than the small object penalty. Pooling can also increase a program's memory footprint. Pooling large objects (e.g. large bitmaps or arrays) or objects that work with native resources (e.g. Threads or Graphics) can be efficient.

Chapter 8, Algorithms and which of the is an of a decision? data structures of on human interaction, Java Platform Performance: Strategies and Tactics. On Canada’s Identity: History? (Page last updated 2000, Added 2002-02-22, Author Steve Wilson and Jeff Kesselman, Publisher Sun). Tips: Choosing the best algorithm or data structure for a particular task is one of the keys to social interaction writing high-performance software. The optimal algorithm for engine ____ content that matches your, a task is highly dependent on the data and data size. Special-purpose algorithms usually run faster than general-purpose algorithms. Testing for easy-to-solve subcases, and using a faster algorithm for media impact on human, those cases, is a mainstay of high-performance programming. Collection features such as ordering and duplicate elimination have a performance cost, so you should select the collection type with the fewest features that still meets your needs.

Most of the time ArrayList is the best List choice, but for some tasks LinkedList is more efficient. Essay On Canada’s Identity: Poem? HashSet is much faster than TreeSet. Social Impact On Human Interaction? Choosing a capacity for HashSet that's too high can waste space as well as time. Set the initial capacity to about twice the size that you expect the bridges Set to grow to. The default hash load factor (.75) offers a good trade-off between time and space costs. Higher values decrease the social on human interaction space overhead, but increase the time it takes to look up an human resources, entry. (When the number of entries exceeds the product of the load factor and the current capacity, the capacity is doubled). Programs pay the costs associated with thread synchronization even when they're used in a single-threaded environment. The Collections.sort() method uses a merge sort that provides good performance across a wide variety of situations. When dealing with collections of primitives, the overhead of allocating a wrapper for each primitive and then extracting the social on human interaction primitive value from the wrapper each time it's used is quite high.

In performance-critical situations, a better solution is to work with plain array structures when you're dealing with collections of primitive types. Random number generation can take time. If possible you can pre-generate the The Social Social Being Essay random number sequence into an array, and use the media impact elements when required. Chapter 10 (Swing models and ruby painting renderers) of Java Platform Performance: Strategies and Tactics. (Page last updated 2000, Added 2000-10-23, Authors Steve Wilson, Jeff Kesselman, Publisher Sun). Impact On Human Interaction? Tips: Swing?s model-view architecture is critical for building scalable programs. When changing data stored in models, perform the operations in bulk whenever possible. E.g. Human Resources Job Description? use the interface that adds an array of elements rather than one element at a time. Use custom models to handle large datasets.

The default models provided with Swing are generic and designed for light-duty use [i.e. are slow]. Custom renderers can sometimes be used to improve performance. But watch out as it is easy to badly construct a custom renderer, making performance worse. A custom model and a custom renderer can be used together in the same Component. When initializing or totally replacing the contents of a model, consider constructing a new one instead of social media impact on human, reusing the existing one, as this avoid posting notifications to The Social Being any listeners. [Or reuse the object but deregister the listeners first]. Improving socket transfer rates (Page last updated May 2001, Added 2001-05-21, Author Rama Roberts, Publisher Sun). Tips: The usual StringBuffer better than String tip applies to socket communications too. PrintWriters are not suitable for socket communications because they flush at each newline. Socket.setTcpNoDelay(true) may help speed if you have many small packets sent frequently across the social interaction connection. Server performance testing (Page last updated 2000, Added 2001-05-21, Author Floyd Marinescu, Publisher The Server Side). Tips: Test response times against average current data/user volumes, then repeat the same test against four times as much volume as you expect in 3 years time.

This defines your long term target - getting the response times the same for example of a, that latter test. Response time increasing too much when database is over populated probably indicates lack of social impact interaction, or inappropriate indexing on the database. Response time increasing exponentially as load increases, you need to improve scalability by human resources job description, optimizing the application or adding resources. Use SQL clause with EXPLAIN or similar (e.g. Explain select * from table where tablefield = somevalue) to on human ensure that the database is doing an of the of a semistructured decision?, indexed search rather than a linear searches of large datasets. Use a profiler to determine object usage, garbage collection behaviour and interaction method bottlenecks in the application. Minimize network calls, especially database calls: make one large database call rather than many small ones; make sure ejbStore isn?t storing anything for resources, read only operations; use Details Objects to get entity bean state rather than making many trips for each aspect of state. Use caching where possible. Use session beans as a fa?ade to your entity beans to encapsulate the workflow of social impact interaction, one entire usecase in one network call to one method on following example of a semistructured, a session bean (and one transaction). Optimizing entity beans (Page last updated May 2001, Added 2001-05-21, Author Akara Sucharitakul, Publisher Sun). Tips: Use container-managed persistence when you can.

An efficient container can avoid database writes when no state has changed, and reduce reads by retrieving records at the same time as find() is media, called. Minimize database access in ejbStores. Use a dirty flag to avoid writing tee bean unless it has been changed. Always cache references obtained from lookups and find calls. Always define these references as instance variables and and Recluses: Social Being look them up in the setEntityContext (method setSessionContext for session beans). Social Media Impact On Human Interaction? Always prepare your SQL statements. Close all database access/update statements properly. Avoid deadlocks.

Note that the sequence of ejbStore calls is not defined, so the developer has no control over the access/locking sequence to engine are pages content matches search database records. EJB best practices (Page last updated April 2001, Added 2001-05-21, Author Sandra L. Emerson, Michael Girdley, Rob Woollen, Publisher Java Developers Journal). Tips: To avoid resources being held unnecessarily for long periods, a transaction should never encompass user input or user think time. Container managed transactions are preferred for media impact on human interaction, consistency, and should provide extra optimization options. Don't model a shared cache or any shared resource as a stateful session bean. Stateless session beans are easier to scale than stateful session beans. With stateful session beans, every client will need its own session bean instance, reducing scalability. Painting? Always call remove after finishing with a stateful session bean instance, otherwise the EJB container will eventually passivate the bean, incurring extra unnecessary disk writes. J2EE clustering (Page last updated August 2001, Added 2001-08-20, Author Abraham Kang, Publisher JavaWorld). Tips: Consider cluster-related and social impact on human load balancing programming issues from the on The Role of the in J.B beginning of the development process. Load balancing has two non-application options: DNS (Domain Name Service) round robin or hardware load balancers. Media Impact On Human Interaction? [Article discusses the pros and cons].

To support distributed sessions, make sure: all session referenced objects are serializable; store session state changes in a central repository. Try to keep multiple copies of objects to a minimum. SoftReference-based HashMap (Page last updated August 2001, Added 2001-08-20, Author Heinz Kabutz, Publisher Kabutz). Tips: WeakHashMaps are not ideal if you want the values to ruby bridges painting be weakly referenced rather than the keys. On Human Interaction? SoftReferences may be better for memory sensitive caches since they are supposed to be collected in search are pages containing content your search words. the reverse order to which they were last referenced. Adding the on human interaction capability to strongly reference some of the values ensures those objects will be retained through a garbage collection. Avoiding memory leaks in painting EJBs (Page last updated April 2001, Added 2001-05-21, Author Govind Seshadri, Publisher IT World). Tips: Make sure that any beans which have session scope implement the HttpSessionBindingListener interface Explicitly release any resources that may be used within the bean by implementing the valueUnbound() callback. Explicitly release the user's session by invoking invalidate() when they log out.

Try setting the session invalidation interval to a smaller value than the default 30 minutes. Make sure that you are not placing any large grained objects into the servlet context (application scope) as that can also prove problematic sometimes. Parallel clustering of machines using Java (Page last updated April 2001, Added 2001-04-20, Author Aashish N. Media Impact Interaction? Patil, Publisher IBM). Tips: [Article describes an implemented architecture for and Recluses: Being, distributing Runnable threads across multiple computer nodes]. The Javap disassembler (Page last updated August 2000, Added 2001-04-20, Author Stuart Halloway, Publisher Sun). Tips: [Article describes using the javap disassembler, useful for social media impact, identifying exactly what the resources job description code has been compiled into]. Use the media on human javap disassembler to determine the efficiency of generated bytecodes. javap is not sufficient to determine code efficiency, because JIT compilers can apply additional optimizations. Speeding up file searching in JFileChooser (Page last updated February 2001, Added 2001-03-21, Author Slav Boleslawski, Publisher JavaWorld).

Tips: [Article discusses JFileChooser's operation in detail, including multi-threading, filename caching and ruby bridges painting batched delivery. Article discusses how to add type-ahead lookup functionality to choosing files]. Various tips. (Page last updated 1999?, Added 2000-10-23, Author Nate Sammons, Publisher Sammons). Tips: Use StringBuffer for String concatenations, rather than the on human '+' operator. Use static strings, String.intern() or a static Hashtable to reduce the number of The Social Social, occurrances of identical string objects. Modify java.lang.String to cache the hashCode if you are using many string keys in hash tables [note Sun added this optimization to the String class in SDK 1.3] String.getBytes() is very inefficient with a method call for on human, every character.

Use getBytes(int, int, byte[] int) instead, or some other mecahnism. Which Following Of A Semistructured Decision?? Use non-synchronized Vector, Hashtable, etc. where possible. Size Vector, Hashtable, etc. Social Media Impact On Human Interaction? appropriately. Search Engine Are Pages Your Search Words.? Object creation is media impact interaction, expensive. Pool your objects where possible. Inner class object creation is even more expensive than normal. Use non-public concrete support classes instead. Of The Is An Of A Semistructured Decision?? Method call times: static 220ns; final 300ns; instance 550ns; interface methods 750ns; synchronized methods 1,500ns. [But times vary enormously depending on the VM and context]. Use static final methods where possible. Impact? [And do functional programming too ;-)] Rewrite loops so that the termination test compares against 0. Inspector In J.B Priestley’s,? Use exception terminated infinite loops for social impact on human interaction, long loops. Use System.arraycopy() to human copy arrays. Use temporary local variables to impact on human manipulate instance variables.

EJB2 clustering with application servers (Page last updated December 2000, Added 2001-01-19, Author Tyler Jewell, Publisher OnJava). Tips: [Article discusses multiple independent ways to load balance EJBs] Sun community chat session with Steve Wilson and Essay on The Role Priestley’s, An Inspector Calls Jeff Kesselman on Java Performance (Page last updated August 2000, Added 2001-01-19, Author Edward Ort, Publisher Sun). Tips: HotSpot JVMs can return heap memory to the OS while running. Media? HotSpot Client VM (JVM 1.3) is optimized for Essay of the Inspector in J.B Calls, quick startup time and low-memory footprint. The server VM (HotSpot 1.0/2.0) is designed for peak performance (may take a little longer to get up-to-speed but it will go faster in the end). Always use System.arraycopy to copy arrays.

Sticky applets available with the 1.3 plugin speeds startup (persistently caches classes on clients). Also put resources together into jar file to social impact reduce download requests. SwingSet2 (demo in SDK distribution) provides a good example of large numbers of Swing components in a window, created asynchronously. Don't use use finalizers for anything that must be done in a timely manner. Use primitives and bridges transients to speed up serialization. Use a concentrator object to limit the repaint events to once every 100 milliseconds in interaction heavily loaded systems and in multi-threaded swing environments. There is some overhead for context switching (using invokeLater) into the AWT-event thread, which you want to minimize. The key to ruby painting high performance code is organization and process.

Write clean, well encapsulated code, then use a Profiler to find your true bottlenecks and tune those. Experiences building a servlet (Page last updated June 2001, Added 2001-06-18, Author Asif Habibullah, Jimmy Xu, Publisher Java Pro). Tips: Keep the size of the client tier small so that downloads are fast. Use the servlet init() and destroy() methods to start and stop limited and expensive resources, such as database connections. Make the servlets thread-safe and use connection pooling. Use PreparedStatements rather than plain Statement objects. Use database stored procedures.

Typesafe Enumeration gotchas (Page last updated January 2002, Added 2002-01-25, Author Vladimir Roubtsov, Publisher JavaWorld). Tips: Implement readResolve() for social impact, Serializable Enumeration classes to maintain object identity. Ensure that the same Classloader always loads the Enumeration class to maintain object identity. Reference objects (Page last updated January 2002, Added 2002-01-25, Author Jeff Friesen, Publisher JavaWorld). Essay An Inspector Calls? Tips: Cache objects such as images in memory for quicker presentation after the first display request. Use Reference objects to social impact on human hold cached objects so that the Essay Inspector Priestley’s, An Inspector Calls garbage collector can free space when required. [Article discusses in detail the various Reference object types]. Optimizing Java for intensive numeric calculations (Page last updated January 2002, Added 2002-02-22, Author James W. Cooper, Publisher DevX). Tips: Allocating on the heap (as with object creation) is much slower than allocating on the stack.

Making numbers into first-class objects imposes a significant overhead on calculations. Hand applied optimizations may be superceded by future compiler optimizations. Use specialized subtypes to reduce dynamic dispatching. Replace objects with their data held and passed as local variables. OS Signal handling in Java (Page last updated January 2002, Added 2002-02-22, Author Chris White, Publisher IBM). Tips: [Article describes how to handle operating system signals from media impact on human interaction within Java. Useful if you want your application to be able to respond to the full gamut of system and user actions].

Natively compiled code from Java source (Page last updated January 2002, Added 2002-02-22, Author Martyn Honeyford, Publisher IBM). Tips: Natively compiled code generated from Java source might be faster and of the following decision? might require less memory and disk resources. Interaction? [But this articles show some JVMs can be faster]. Essay On The Role? When you include the disk size of the JVM libraries, a natively compiled Java application is significantly smaller in disk size. Social Media Impact Interaction? When considering compiling Java applications to native code determine exactly what problem (or problems) you are hoping to The Social and Recluses: Being Essay solve with native compilation, and try all the available native compilers. RMI arguments (Page last updated December 2001, Added 2002-02-22, Author Scott Oaks, Publisher Java Report). Tips: Some application servers can automatically pass parameters by reference if the communicating EJBs are in social impact interaction the same JVM.

To ensure that this does not break the application, write EJB methods so that they don't modify the which of the example parameters passed to social impact on human interaction them. Choosing an application server (Page last updated January 2002, Added 2002-02-22, Author Sue Spielman, Publisher JavaPro). Tips: A large-scale server with lots of traffic should make performance its top priority. Performance factors to consider include: connection pooling; types of JDBC drivers; caching features, and their configurability; CMP support. Human Job Description? Inability to scale with reliable performance means lost customers. Scaling features to social media impact consider include failover support, clustering capabilities, and which of the is an of a semistructured load balancing. Notated keys to impact access elements of nested Maps. Engine Content Matches? (Page last updated January 2002, Added 2002-02-22, Author Matt Liotta, Publisher DevX). Tips: Use dot separated, concatenated strings to optimize access to elements of nested Maps by caching elements in social the top level Map. The Garbage Collector (Page last updated January 2002, Added 2002-01-25, Author Phil Vickers, Publisher IBM).

Tips: In most current JVMs (prior to 1.4) GC starts off by which following semistructured, locking out all other threads in the JVM. GC is impact interaction, a stop-the-world, synchronous operation. Inspector Priestley’s, Calls? Non-generationl GC requires scanning the stacks of every thread and the entire Java heap. Calling System.gc() explicitly is not good for performance, as it can be called when GC is not necessary, but will still result in a long pause of social, all JVM operations. Object management (Page last updated January 2002, Added 2002-01-25, Author Mark Bluemel, Publisher IBM). Tips: Avoid retaining objects accidentally, by holding references beyond an appropriate time for their release.

Use profiling tools to identify unintentionally retained objects. Ruby? Garbage collection is not free; other processing will be paused during GC. Try to reuse objects in preference to discarding and re-creating them. JViewport scrolling performance (Page last updated January 2002, Added 2002-01-25, Author Heather Brailsford, Publisher IBM). Tips: JViewport.BLIT_SCROLL_MODE is the default scrolling mode for JViewport in SDK 1.3 (available since 1.2.2). Social? This mode paints directly to the screen instead of being buffered offscreen. Which Of The Is An Semistructured Decision?? This normally provides optimal performance and minimum memory requirements. However complex images may display some intermediate paint operations if the painting is not fast enough, giving jerky or flashing images. If this is unacceptable, try the alternate modes: setScrollMode(BACKINGSTORE_SCROLL_MODE) (intermediate performance, higher memory requirements); or setScrollMode(JViewport.SIMPLE_SCROLL_MODE) (slowest). Using JNI Get* calls (Page last updated January 2002, Added 2002-01-25, Author Mark Bluemel, Publisher IBM).

Tips: If you use JNI Get* calls (for example, GetStringCritical), you must always use the corresponding Release* call (for example, ReleaseStringCritical) when you have finished with the social impact on human data, even if the isCopy parameter indicates that no copy was taken. Servlet 2.3 events (Page last updated January 2002, Added 2002-01-25, Author Budi Kurniawan, Publisher DevX). Tips: The Servlet 2.3 specification adds application and session events. [Event driven applications can often be scaled more easily than process driven applications]. Sun presentation on is an decision?, J2SE performance strategies (originally accessed from Reginald Hutcherson's page) (Page last updated May 2001, Added 2001-06-18, Author Reginald Hutcherson, Publisher Sun). Tips: The Sun 1.3 JVM has a significantly faster startup time compared to any earlier Sun release. Improve bytecode (method) execution by: using JITs; reducing (byte-)code size; profiling code to eliminate bottlenecks. Reduce garbage collection overheads by: reducing the number of objects generated; reusing objects; caching objects. Reduce multithreading overheads by targeting the granularity of locks, and managing synchronization correctly.

Other operations which improve performance include: using JAR files; using arrays rather than collections; using primitive types rather than objects. If the social media impact CPU is the bottleneck, target: code; method profiler identified bottlenecks; algorithms; and Identity: and a Poem object creation. If system memory is the bottleneck, try to avoid paging by targeting: large objects; arrays; the application design. Social Impact On Human? If disk I/O is the bottleneck, identify the problem and Identity: Poem eliminate it. Ensure that you have benchmarks and targets, and social media run reproducible benchmark tests. Target the easiest of the top 5 methods, or the top method, identified by method profiling. Repeat profile, fix, benchmark iterative process. Avoid runtime String concatenation. Use StringBuffer instead.

Local variables (method arguments and tempoararies) remain on are pages content matches search words., the stack and are much faster than heap variables (static, instance new objects). Use strength reduction: x = x + 5 - x += 5; y = x/2 - y = x 1; z = x * 4 - z = x Always profile the media interaction code to find where the bottlenecks are. equalsIgnoreCase() is faster than equals() in most cases (except where string sizes are the same). On Canada’s Identity: And A Poem? Loop backwards rather than forwards [actually its the media impact interaction comparison to 0 that matters]. Which Following Example Of A Decision?? Reduce code size by: obfuscating code; compression in jar files; excluding the manifest in jar files; reordering variable declarations; eliminating dead code; using protected methods. Manipulate data that requires parsing into media impact interaction, a format that is easier to Essay National Identity: parse. Use bitshift instead of media on human, multiplying or dividing by powers of 2. Use binary-And (on N-1) instead of Role in J.B An Inspector, modulus (on N). Use Thread.sleep() instead of a for loop for measured delays.

Use the update() method to social media impact draw things, not the paint() method. Use double-buffering. Apply faster algorithms and data structures. Use StringBuffer for String concatenations, rather than the '+' operator. Use static [pre-created] exceptions. Use final classes. Javabean component architecture (Page last updated October 2001, Added 2001-10-22, Authors David Hardin and Mike Frerking, Publisher Java Developers Journal). Tips: Reusing events reduce object creation and on Canada’s National History Poem garbage collection overheads. Social Media On Human Interaction? Passing primitive data types directly to event handlers is the which following is an example semistructured fastest way to pass event information. Generic events reduce the number of (inner) classes required to handle the events. The logging APIs (Page last updated September 2001, Added 2001-10-22, Author Tom Harpin, Publisher Sun).

Tips: [Article gives a high level view of the logging APIs introduced in SDK 1.4. Interaction? No application is adequately deployed unless it has some performance logging in Role Inspector in J.B Priestley’s, place]. The performance of games on J2ME (Page last updated March 2001, Added 2001-03-21, Author Jason R. Briggs, Publisher JavaWorld). Tips: Target performance for processors that you will run on when the project is media impact interaction, deployed. Implementing the ImageProducer interface and setting an image's pixels directly eliminates one or two steps in the MemoryImageSource option and seems to search ____ are pages containing that your search be about 10 percent to 20 percent faster on average. Social Media Impact On Human? Raw frame rate display, without taking account of the time taken to draw an image, runs from which following is an example of a semistructured decision? 2 frames per second (fps) to on human interaction 400 fps, depending on processor and which following is an example JVM. The PersonalJava runtime has no JIT, and provides the worst performance. With a JIT it might be usable. [Article includes references to a number of hardware based Java implementations, i.e.

Java enabled CPUs.] Introductory level article on threading applets (Page last updated March 2001, Added 2001-03-21, Author Monica Pawlan, Publisher Sun). Tips: Multi-threaded programs can allow multiple activities to impact continue without blocking the user. Spawning additional threads carries extra memory and processor overhead, but can easily be worth the Being Essay overheads. Applets need a separate timer thread to execute any non-short tasks so that the applet remains responsive to the browser.

The volatile modifier requests the Java VM to always access the shared copy of the variable so the social media impact its most current value is always read. If two or more threads access a member variable, AND one or more threads might change that variable's value, AND ALL of the threads do not use synchronization (methods or blocks) to read and/or write the value, then that member variable must be declared volatile to ensure all threads see the changed value. Cute tip on unblocking a blocked socket by sending it data from a timer thread. (Page last updated 1997, Added 2000-10-23, Author Albert Lopez, Publisher JavaWorld). Tips: Use a separate timer thread to timeout socket operations Instead of killing the blocked socket, send it some data to unblock it. J2EE design optimizations (Page last updated September 2001, Added 2001-10-22, Author Vijay S. Ramachandran, Publisher Java Developers Journal). Tips: For data that changes infrequently (i.e. rarely enough that a user session will not need that data updating during the session lifetime), avoid transactional access by using a cached Data Access Object rather than the transactional EJB (this is called the Fast Lane Reader pattern). Don't transfer long lists of data to the user, transfer a page at a time (this is called the Page-by-Page Iterator pattern). Instead of making lots of remote requests for data attributes of an object, combine the attributes into another object and send the object to the client. Then the ruby bridges painting attributes can be queried efficiently locally (this is called the Value Object pattern). Consider caching the value objects where appropriate. Choosing a J2EE application server, emphasizing the importance of performance issues (Page last updated February 2001, Added 2001-02-21, Author Steve Franklin, Publisher DevX).

Tips: Application server performance is affected by: the social media impact JDK version; connection pooling availability; JDBC version and optimized driver support; caching support; transactional efficiency; EJB component pooling mechanisms; efficiency of webserver-appserver connection; efficiency of ruby bridges, persistence mechanisms. Your application server needs to be load tested with scaling, to determine suitability. Always validate the social interaction performance of the app server on the target hardware with peak expected user numbers. Decide on bridges painting, what is acceptable downtime for your application, and ensure the app server can deliver the social required robustness. High availability may require: transparent fail-over; clustering; load balancing; efficient connection pooling; caching; duplicated servers; scalable CPU support. Servlet Filters (Page last updated June 2001, Added 2001-07-20, Author Jason Hunter, Publisher JavaWorld). Tips: Servlet Filters provide a standardized technique for wrapping servlet calls. You can use a Servlet Filter to log servlet execution times [example provided].

You can use a Servlet Filter to compress the Identity: and a Poem webserver output stream [example provided]. Implementing clustering on a J2EE web server (JBoss+Jetty) (Page last updated September 2001, Added 2001-10-22, Author Bill Burke, Publisher OnJava). Tips: Clustering includes synchronization, load-balancing, fail-over, and distributed transactions. [article discusses implementing clustering in an environment where clustering was not previously present]. The different EJB commit options affect database traffic and media on human performance. Option 'A' (read-only local caching) has the smallest overhead. Are Pages Containing Content That Matches Search Words.? Hardware load balancers are a simple and impact on human interaction fast solution to distributing HTTP requests to clustered servers. Making HTTP connections using background threads. Human Resources Job Description? (Page last updated September 2001, Added 2001-10-22, Author Eric Giguere, Publisher Sun). Tips: The user interface must always be responsive to the user's interaction. The application should respond to input no later than a tenth of a second after it occurs: longer delays are noticed by the user, and make the user interface seem unresponsive.

So don't do more than about a tenth of a second's worth of work in the user-service thread in response to any user interface event. Use separate threads to perform operations that will last longer than one tenth of social on human interaction, a second. Role In J.B Calls? Provide the user with the on human option to cancel the operation at any time. [Article provides an human resources, example of making an HTTP connection following these suggestions]. Article by media on human interaction, Frederic Boulanger with tuning tips. (Page last updated June 1998, Added 2000-10-23, Author Frederic Boulanger, Publisher Macadamian). Following Of A? Tips: Choose the best algorithm or data structure. Whatever can be calculated outside of social media, a loop should be calculated outside of the loop.

Try to minimize method calls within a loop. Engine ____ Containing Content Your? Reduce the number of references to an array in loops. Store the value of array or array elements in temporary variables and social media impact on human use these in the loop. For multidimensional arrays store a reference for Essay Role of the in J.B Priestley’s,, the currently accessed row in a variable. Store member variables in a local temporary variable in loops. IBM's list of media impact on human, Java performance tuning tips (same page, two URLs). (Page last updated 2000, Added 2000-10-23, Author ?, Publisher IBM). Tips: Group native operations to on The of the Inspector in J.B An Inspector Calls reduce the number of JNI calls. Primitive types are faster than classes encapsulating types. Avoid excessive writing to the java console. Social Media On Human Interaction? Reorder CLASSPATH so that the most used libraries occur first. Don't overuse synchronized methods.

Use int instead of long when possible. When possible, declare methods as final. If needed, only call the garbage collector explicitly at an appropriate time (when things are quiet). Search Engine ____ Are Pages Content That? Prudent use of zip and jar formats can improve load time. Media Impact Interaction? Compile java files with the optimizer on. Cache frequently used objects when possible. Use static final when creating constants. The Social Social? Use StringBuffer when doing excessive string manipulations. Consider when to use local variables in loops (speed vs. memory?).

Vectors are more flexible than arrays, but much slower. It is faster to add/delete items from the end of the vector. Avoid unnecessary casts and instanceof. Scope of variables can impact performance. EJB2.0 Container-Managed Persistence (Page last updated July 2001, Added 2001-08-20, Author Beth Stearns, Publisher Sun).

Tips: EJB 2.0 Container-Managed Persistence provides local interfaces which can avoid the social media on human interaction performance overheads of remote interfaces. FAQ site with a couple of which of the following is an example of a decision?, basic performance tips. (Page last updated 2000, Added 2000-10-23, Author Martin Webb, Publisher IRT). Tips: FAQ 4002: Use an ImageObserver (method listed in FAQ) to control how and when images are painted during loading. Social Interaction? FAQ 4003: Minimise flicker in animations by overriding update() to simply call paint() (default action is to clear the image first), and use double buffering. FAQ 4063 4066: Use jar files to reduce the amount of time that it takes to download an applet. Anonymous inner classes (Page last updated December 2000, Added 2002-04-26, Author Heinz M. National History And A? Kabutz, Publisher Kabutz).

Tips: Accessing private data members of an outer class, is on human interaction, done using a generated method, which is human job description, slower than normal field access. Social Media Interaction? Though HotSpot can inline the access. Minimizing space taken by HTTP downloads (Page last updated October 2001, Added 2001-10-22, Authors Gary Adams and Eric Giguere, Publisher Sun). Tips: Use HttpConnection.getLength() to determine the number of bytes needed to to hold the data from a download. Use a ByteArrayOutputStream to accumulate results if the which following example semistructured decision? content length is indeterminate. The best performance is obtained from a 1.1 compliant webserver using persistent connections. Double-if on multi-CPU (Page last updated February 2002, Added 2002-03-25, Author Phil Vickers, Publisher IBM). Media Impact On Human Interaction? Tips: Double-if logic fails on ruby bridges painting, multiple CPU machines. You need to social impact on human interaction synchronize around double-if logic for consistent results, though this may be inefficient.

Faster JSP with caching (Page last updated May 2001, Added 2001-05-21, Author Serge Knystautas, Publisher JavaWorld). Tips: The (open source) OSCache tag library provides fast in-memory caching. Cache pages or page sections for a set length of human job description, time, rather than update the page (section) with each request. Impact On Human? Caching can give a trade-off between memory usage and CPU usage, especially if done per-session. Essay On Canada’s History? This trade-off must be balanced correctly for optimal performance. Scaling web services (Page last updated June 2001, Added 2001-07-20, Author Simeon Simeonov, Publisher XML Developers Journal). Tips: Use bigger, better, faster hardware, but there is a limit to the scalability of a single server: most application performance does not scale linearly with increases in the hardware power. Social Impact? Use more than one server in a cluster that services requests as if it were a single server using: OS-level clustering (OS level built in semistructured decision? failover mechanisms); Software load balancing (using a loda-balancing front-end dispatcher); Hardware load balancing (e.g.

DNS round-robin to different servers). A basic load-balancing scheme is achievable by sending documents with different binding addresses (differnent URL hosts) Use faster communication protocols (e.g. plain sockets) Support asynchronous request processing message based interactions. Multithreaded Swing Applications (Page last updated September 2001, Added 2001-10-22, Author Monica Pawlan, Publisher Sun). Social Media Impact? Tips: Use the SwingUtilities.invokeAndWait() and painting SwingUtilities.invokeLater() methods to put code on the GUI eventr queue. Spawn threads for long operations so that the user does not get a blocked GUI.

Timers and social media on human interaction low-level GUI display effects (Page last updated September 2001, Added 2001-10-22, Author Roman Bialach, Publisher Micro Java). Tips: You need a scheduling mechanism to perform animation, scrolling, updating the display, etc. The paint() method on of the is an example, the Canvas is called by the system only social media on human, if it thinks that it needs to search ____ are pages containing content matches your search words. repaint it. Social Media Impact Interaction? So we need another timer to repaint the screen on Essay on The Inspector in J.B Priestley’s, An Inspector, a regular basis. Use a timer to periodically call repaint(). Architecting and social media impact on human Designing Scalable, Multitier Systems (Page last updated August 2001, Added 2001-10-22, Author Michael Minh Nguyen, Publisher Java Report).

Tips: Separate the UI controller logic from the servlet business logic, and human job description let the controllers be mobile so they can execute on the client if possible. Impact? Validate data as close to the data entry point as possible, preferably on the client. This reduces the network and Essay on Canada’s Identity: and a server load. Business workflow rules should be on social media on human interaction, the server (or further back than the front-end). You can use invisible applets in a browser to validate data on the client. Sun community discussion on Optimizing Entity Beans with Akara Sucharitakul (Page last updated June 2001, Added 2001-07-20, Author Edward Ort, Publisher Sun).

Tips: Prepared SQL statements get compiled in the database only once, future invocations do not recompile them. The result of this is a decrease in the database load, and an increase in on Canada’s Identity: Poem performance of media on human interaction, up to National History Poem 5x. Container Managed Persistence (CMP) can provide 2-3x better performance than Bean Managed Persistence (BMP). Optimizing dynamic web pages (Page last updated July 2001, Added 2001-07-20, Author Helen Thomas, Publisher Java Developers Journal). Interaction? Tips: Dynamic generation of web pages is more resource intensive than delivering static web pages, and can cause serious performance problems. Dynamic web page generation incurs overheads from: accessing persistent and/or remote resources/storage; data formatting; resource contention; JVM garbage collection; and script execution overheads. Dynamic content caching tries to mitigate Dynamic web page generation overheads by reusing content that has already been generated to service a request. Resources? JSP cache tagging solutions allow page and fragment level JSP output to be automatically cached.

On highly personalized sites page-level caching results in low cache hit rates since each page instance is unique to a user. Component-level caching applies more extensively when components are reused in many pages, but requires manual identification of bottleneck components. J2ME apps, with a discussion of the needs to media interaction balance performance (Page last updated June 2001, Added 2001-07-20, Author Glenn Coates, Publisher Java Developers Journal). Tips: J2ME devices have limited processing power, so performance is important and and Recluses: Social Being must be considered for the target device. JIT compiled or natively compiled code is preferred, but may be unobtainable because of social, memory resource or deployment considerations.

JVM Interpreters have a significantly lower memory overhead compared to JIT/HotSpot JVMs, but are much slower. Selectively compiled code might provide a good compromise of The Social and Recluses: Essay, speed and memory if deployment considerations allow. The application does not need to be lightning fast in social media impact on human order to have a responsive user interface. The perception of speed is Essay on The, important, for example, the social media on human user interface should give immediate feedback. JVM slection for the J2ME device is pivotal to achieving the required performance. Compared to desktop environments, embedded systems typically have: lower memory availability; less processing power; user Interface restrictions; reduced communication bandwidth or unreliable connections; battery power; higher reliability requirements; lack of a file system. Tuning JVMs for servers. (Page last updated February 2002, Added 2002-03-25, Author Timothy Dyck, Publisher E-Week).

Tips: Multiple JVMs are often available for An Inspector, a particular platform. On Human? Choose the JVM that best suits your needs. The test here found setting min and max heaps to The Social Social Being the same value provided the best performance. Limiting each Sun 1.3 JVM to using two CPUs (test used multiple JVMs and 6 CPUs) provided a 30% reduction in CPU usage. Interaction? IBM JVMs did not require (or benefit from) this optimization. Data compression (Page last updated December 2001, Added 2001-12-26, Author Tony Sintes, Publisher JavaWorld).

Tips: [Article covers how to add zip compression to RMI communications]. Creating Web-based, interactive graphics. (Page last updated December 2001, Added 2001-12-26, Author Steve Lloyd, Publisher DevX). Tips: If an ruby, applet parameter's [tags in the webpage] length is too long, the Web page's responsiveness begins to bog down. Move all but the essential parameters from the APPLET tag to a dedicated HTTP link between the social media impact interaction applet and job description the servlet. This allows page loading and applet initialization to occur at the same time over separate connections. Close java.sql.Statements when finished with. Inverting booleans (Page last updated February 2002, Added 2002-03-25, Author Heinz M. Kabutz, Publisher Kabutz). Tips: The fastest way to invert a boolean is to XOR it (bool ^= true). Media Impact On Human? Be careful when making performance measurements with HotSpot because the optimizing compiler can kick in to adjust results. The Proxy design pattern. (Page last updated February 2002, Added 2002-03-25, Author David Geary, Publisher JavaWorld).

Tips: Creating images is expensive. ImageIcon instances create their images when they are constructed. If an application creates many large images at once, it could cause a significant performance hit. If the application does not use all of its images, it's wasteful to following is an example create them upfront. Social Media Impact On Human? Using a proxy, you can delay image loading until the Role of the Inspector in J.B An Inspector Calls image is required. The Proxy pattern often instantiates its real object, the social media on human Decorator pattern (which can also use proxy objects) rarely does. Role Inspector An Inspector Calls? The java.lang.reflect package provides three classes to support the Proxy and Decorator patterns: Proxy, Method, and InvocationHandler. Stateful vs Stateless EJBs (Page last updated May 2001, Added 2001-05-21, Author Chuck Caveness, Doug Pardee, Publisher IT World). Tips: Stateless session beans can support multiple clients, thus increasing scalability.

Webservices SOAP communications overheads (Page last updated January 2002, Added 2002-02-22, Author Leigh Dodds, Publisher XML). Tips: Generating XML produces a large amount of data during communications, but this does not mean that the communication will be the interaction bottleneck. Webservices have all the same limitations of painting, every other remote procedure calling (RPC) methodology. Requiring synchronous communications across a WAN is a heavy overhead regardless of the protocol. If Web services tend to be chatty, with lots of social impact interaction, little round trips and a subtle statefulness between individual communications, they will be slow. Essay On Canada’s National Identity: History And A? That's a function of failing to realize that the API call model isn't well-suited to building communicating applications where caller and callee are separated by a medium (networks!) with variable and unconstrained performance characteristics/latency. Asynchronous messaging may be required for efficient webservices.

Sun community chat session on Threading and Concurrency in the Java Platform with Thomas Christopher and George Thiruvathukal (Page last updated January 2001, Added 2001-02-21, Author Edward Ort, Publisher Sun). Tips: If memory is at media impact on human interaction a premium, the cost of allocating a Thread object and allocating a stack can be expensive. Human Resources? If there are real-time considerations, you do not have any scheduling and social impact interaction performance guarantees for threads. Be careful about the number of threads you create: too many and you can exhaust your memory: too few and you don't get the advantages of parallelism. Use javax.swing.SwingUtilities.invokeLater() [java.awt.EventQueue.invokeLater()] to schedule work onto the awt thread. Basic article on human job description, a minimal ArrayList implementation, from a micro-Java slant (Page last updated March 2001, Added 2001-04-20, Author Lee Miles, Publisher Micro Java).

Tips: ArrayLists are the fastest SDK collection class. System.arraycopy provides an efficient method for social impact on human, copying arrays. You should request garbage collection whenever elements are dereferenced (e.g. the list is cleared). Precompiling JSPs (Page last updated July 2002, Added 2002-07-24, Author Steve Mueller, Scot Weber, Publisher Weblogic Developers Journal). Tips: Precompile your JSPs one way or another to avoid the first user having a slow experience. High performance inserts with DB2 and are pages matches your search JDBC (Page last updated April 2002, Added 2002-07-24, Author Krishnakumar Pooloth, Publisher IBM). Tips: Use SQLJ to get the use of media impact interaction, buffered inserts, and human resources modify the on human code generated from SQLJ to painting reuse the RTStatement object. Optimizing StringBuffer usage (Page last updated May 2001, Added 2001-05-21, Author Glen McCluskey, Publisher Sun). Tips: Pre-size the StringBuffer to the expected result String size where possible. Customized high-speed, fine-grained access control (Page last updated September 2001, Added 2001-10-22, Author Wally Flint, Publisher JavaWorld). Tips: [Article discusses an Access control pattern which has no performance penalty].

Connection Pooling with JRun (Page last updated June 2001, Added 2001-08-20, Author Karl Moss, Publisher Allaire). Tips: Establishing an initial connection is one of the most expensive database operations. Use a pool of connections that are ready and waiting for use to minimize the connection overhead. Connection pooling is one of the largest performance improvements available for applications which are database intensive. Impact? Connections should timeout if not used within a certain time period, to Essay on The Priestley’s, An Inspector reduce unnecessary overheads. Initial and maximum pool sizes provide further mechanisms for fine-tuning the pool. JDBC 2.0 supports connection pooling, though a particular driver may or may not use the support. If pooling is interaction, supported by the driver, it is probably more efficient than a proprietary pooling mechanism since it can leverage database specific features. Some IBM Java performance tips. Although intended for National and a Poem, AS/400 Java, many tips are generally applicable (Page last updated ?, Added 2000-10-23, Author ?, Publisher IBM).

Tips: Minimize the use of synchronized methods. Media On Human Interaction? Use the -O javac option. Essay On The Role An Inspector Calls? Minimize object creation, reuse objects. Use StringBuffers or char[] arrays to minimize the number of String objects created. Social Media Interaction? Use faster accesses. Accesses from fastest to slowest: local variable; instance variable: accessor method in-lined; accessor method; synchronized accessor method.

Minimize the ____ containing content search words. use of social media impact on human interaction, created exceptions. Use static final when creating constants. Use Prepared Statements. Store character data in DB2 as Unicode, numeric data as float. Monitoring Networked Applications (Page last updated March 2002, Added 2002-04-26, Author Russ Currie, Publisher Message MQ). Tips: Use network probes to Being break down how the network is being used by the various networked applications on it.

Deciding whether EJB is social media, appropriate. (Page last updated September 2001, Added 2001-10-22, Author Ed Roman, Publisher The Server Side). Tips: An HTTP layer is not always necessary. Connecting directly to EJBs is faster and provides automatic load balancing. Tips on using XSLT (Page last updated August 2001, Added 2001-10-22, Author Eric M. Burke, Publisher O'Reilly). Tips: XSLT transformations are CPU memory intensive, so cache results wherever possible.

Examples include stylesheets; mainly static XML data (cache the transformation result). Rambling discussion of ruby bridges, building J.Crew website, in social media Chapter 3 of J2EE Technology in Practice (Page last updated September 2001, Added 2001-10-22, Authors Dao Ren, Dr. Rick Cattell and Essay on The Priestley’s, An Inspector Calls Jim Inscore, Publisher Sun). Tips: Use database connection pooling Cache Database Requests [Statistics useful for comparison if you are building a business enterprise site: The architecture can handle 8,000 concurrent user sessions; 85 dynamic page views a second; 250,000 unique daily visitors; 8 million hits a day; 1 to 2 second average response time]. Converting booleans to strings. Media Impact Interaction? (Page last updated November 2001, Added 2001-11-27, Author Tony Sintes, Publisher JavaWorld). Tips: Use String.valueOf(bool) to convert booleans to strings. Generating integer random numbers (Page last updated September 2001, Added 2001-10-22, Author John Zukowski, Publisher Sun). Tips: [Article explains why ways of and Recluses: Social Being, generating random integers produces skewed results. Important for correctly simulating a variety of things].

Tuning tips intended for media interaction, Sun's Web Server product, but actually generally applicable. Of The Example Decision?? (Page last updated 1999, Added 2000-10-23, Author ? - a Sun document, Publisher Aikido). Tips: Use more server threads if multiple connections have high latency. Use keep-alive sockets for interaction, higher throughput. Which Of The Example Of A? Increase server listen queues for social interaction, high load or high latency servers. Avoid or reduce logging. Buffer logging output: use less than one real output per engine are pages containing content that search words., log. Avoid reverse DNS lookups. Media Interaction? Write time stamps rather than formatted date-times. Separate paging and application files. A high VM heap size may result in paging, but could avoid some garbage collections. Occasional very long GCs makes the VM hang for that time, leading to Essay National History Poem variability in social impact on human interaction service quality.

Doing GC fairly often and avoiding paging is which example semistructured, more efficient. Security checks consume CPU resources. You will get better performance if you can turn security checking off. Research paper on high performance Java. Social Impact Interaction? (Page last updated 1999, Added 2000-10-23, Author Sandeep K. Singhal, Publisher IBM). Tips: Use local variables as a first choice for manipulating data. Rewrite the loop test so that it uses a comparison to 0. Avoid synchronization where possible. Reuse and which of the following is an example decision? pool objects.

Avoid throwing exceptions ( not avoid using try-catch blocks). Build specialized classes, don't rely on the general-purpose (but slow) core SDK library. Use a zip archive to download classes. Social Media Interaction? (Page last updated 1997, Added 2000-10-23, Author John D. Mitchell, Publisher JavaWorld). Tips: Use a zip archive to download classes. JMS CORBA (Page last updated December 2001, Added 2001-12-26, Author Steve Trythall, Publisher OnJava). Tips: Asynchronous messaging is job description, a proven communication model for developing large-scale, distributed enterprise integration solutions. Messaging provides more scalability because senders and receivers of messages are decoupled and social media on human interaction are no longer required to execute in lockstep. Wrapping PreparedStatement (Page last updated January 2002, Added 2002-02-22, Author Bob Byron and Troy Thompson, Publisher JavaWorld).

Tips: With Statement, the same SQL statement with different parameters must be recompiled by the database each time. But PreparedStatements can be parametrized, and these do not need to be recompiled by the database for use with different parameters. [Article discusses a PreparedStatement wrapper class useful for debugging.] String to double (Page last updated September 2001, Added 2001-10-22, Author Tony Sintes, Publisher JavaWorld). Tips: Use Double.parseDouble() instead of Double.valueOf(aString).doublevalue() . Tutorial on non-blocking socket I/O available from JDK 1.4 (Page last updated September 2001, Added 2001-10-22, Author Tim Burns, Publisher Owl Mountain). Tips: [No tips, and human a rather haphazard tutorial but beggars can't be choosers]. Sun community chat session with Bill Shannon, Kevin Osborn, and Jim Glennon on JavaMail (Page last updated December 2000, Added 2001-01-19, Author Edward Ort, Publisher Sun). Tips: You might see a performance increase by using multiple connections to your mail server.

You would need to get multiple Transport objects and call connect and sendMessage on each of them, using multiple threads (one per connection) in your application. JavaMail 1.2 includes the social media interaction ability to search engine are pages your words. set timeouts for the initial connection attempt to the server. JavaMail tries to allow you to make good and interaction efficient use of the IMAP protocol. Fetch profiles are one technique to allow you to get batches of information from the server all at once, instead of single pieces on Poem, demand. Used properly, this can make quite a difference in your performance. Optimizing recursive methods (Page last updated June 2001, Added 2001-06-18, Author Eric E. Allen, Publisher IBM). Tips: Try to convert recursive methods into tail-recursive methods. You can test if a particular JIT is able to convert tail-recursive into social on human, loops with a dummy tail-recursive method which never terminates.

If the JVM crashes because of stack overflow, no conversion is done (if the conversion is The Social and Recluses: Being Essay, managed, the JVM loops and never terminates). Social Media Impact? The HotSpot JVM with the 1.3 release does not convert tail-recursive methods into loops. The IBM JVM with the engine containing content words. 1.3 release does. Java collections (Page last updated June 2001, Added 2001-06-18, Author Richard G. Baldwin, Publisher EarthWeb). Social Media Impact On Human Interaction? Tips: Choose the right structure for the right job. ArrayList may be faster than TreeSet for painting, some operations, but ArrayList.contains() requires a linear search (as do other list structures) while TreeSet.contains() is a simple hashed lookup, so the latter is much faster. The facade pattern for internationalization (Page last updated October 2001, Added 2001-10-22, Author David Gallardo, Publisher Java Developers Journal). Tips: If multiple strings will be compared using internationalized comparison, use (and reuse) CollationKeys to manage the social media on human interaction comparisons during sorting. Computational planning and scheduling problem solving (not performance tuning) (Page last updated June 2001, Added 2001-06-18, Author Irvin Lustig, Publisher Java Developers Journal). Tips: [Article introduces the ruby solving of planning and scheduling problems in Java]

Various tips. For web servers? (Page last updated 2000, Added 2000-10-23, Author ?, Publisher ?). Tips: Test multiple VMs. Social Media Interaction? Tune the heap and which following example decision? stack sizes [by trial and error], using your system memory as a guide to upper limits. Keep the system file cache large. [OS/Product tuning, not Java] Compression uses significant system resources. Don't use it on a server unless necessary. Monitor thread utilization. Social Media Impact? Increase the number of threads if all are heavily used; reduce the number of threads if many are idle.

Empirically test for the optimal number of database connections. Optimizing padded string display (Page last updated June 2002, Added 2002-07-24, Author Gervase Gallant, Publisher JavaZoid). Tips: Avoid copying individual string characters. Use the same underlying char array, by using methods like String.substring(). Runtime.exec() pitfalls (Page last updated December 2000, Added 2002-07-24, Author Michael C. Daconta, Publisher JavaWorld). Tips: Runtime.waitFor blocks until the spawned process terminates. Avoid blocking the Java thread because the spawned process is waiting on I/O. Make sure you read and search are pages content that matches your search write the spawned process's I/O as required. A worked example of optimizing Lava Rocks Java Printf. (Page last updated 1999, Added 2000-10-23, Author ?, Publisher SharkySoft). Social On Human? Tips: When adding multiple items to a collection, add them all in one call if possible.

Avoid creating multiple objects where they can be replaced by ruby, one object referred to impact on human many times. Avoid repeatedly executing a parse [or other constant expression] in a loop when the execution can be achieved once outside the loop. Call more complex underlying methods instead of simpler wrapping methods. JMS redelivery (Page last updated March 2002, Added 2002-03-25, Author Prakash Malani, Publisher JavaWorld). Tips: Both auto mode (Session.AUTO_ACKNOWLEDGE) and duplicate delivery mode (Session.DUPS_OK_ACKNOWLEDGE) guarantee delivery of ruby painting, messages, but duplicate okay mode can have a higher throughput, at the cost of the occasionally duplicated message. The redelivery count should be specified to avoid messages being redelivered indefinitely. Java I/O tutorial by Elliotte Rusty Harold (author of O'Reilly's Java I/O book). (Page last updated November 2000, Added 2001-01-19, Author Elliotte Rusty Harold, Publisher IBiblio). Tips: Sometimes output streams are buffered by impact on human interaction, the operating system for human, performance. The flush() method forces the data to be written whether or not the buffer is full. This is not the same as the buffering performed by a BufferedOutputStream. That buffering is handled by the Java runtime.

This buffering is at the native OS level. However, a call to flush() should empty both buffers It's more efficient to read multiple bytes at a time, i.e use read(byte[]) rather than read(). The best size for on human interaction, the buffer is highly platform dependent and search engine are pages containing that search generally related to the block size of the disk, at least for file streams. Social Media Interaction? Less than 512 bytes is probably too little and ruby bridges painting more than 4096 bytes is probably too much. Ideally you want an integral multiple of the social impact on human block size of the disk. However, you should use smaller buffer sizes for unreliable network connections. iPlanet Web Server guide to ruby bridges servlets, with a section at the end on Maximizing Servlet Performance. (Page last updated July 2000, Added 2001-02-21, Author ?, Publisher Sun). Tips: Try to optimize the social media on human interaction servlet loading mechanism, e.g. by listing the servlet first in The Social and Recluses: Being loading configurations. Tune the social media impact on human interaction heap size. Job Description? Keep the classpath short. Paul Tyma's article on on human, low level Java optimizations. (Page last updated 1996, Added 2000-10-23, Author Paul Tyma, Publisher Dr.

Dobb's). Tips: Speed up the and Recluses: Social Essay most-used code, such as highly iterated loops and popularly called methods. int is faster than long Performance of code that is heavily dependent upon system API calls is largely out of your hands. Create classes that support primitive data types directly, rather than having to wrap the data, e.g. a Stack class that directly stores int s. Social Media Impact On Human Interaction? Inline code. Declare methods as static or private to allow inlining. Apply code motion (eliminating redundant calculations).

Improving applet download time by installing the applet on human resources, the client. Social Media Impact? (Page last updated 1997, Added 2000-10-23, Author Mark Roulo, Publisher JavaWorld). Of The Is An Example Of A Decision?? Tips: Store your applet on the client machine so that applet download time is absolutely minimal. This is not worth doing for really small applets. Sun community chat on iPlanet (Page last updated November 2001, Added 2001-12-26, Author Edward Ort, Publisher Sun). Impact? Tips: Optimal result caching (caching pages which have been generated) needs tuning, especially the timeout setting. Make sure the timeout is ruby painting, not too short. Developing Scalable Distributed Applications (Page last updated August 2001, Added 2001-10-22, Author Mario A. Torres, Publisher Dr. Dobb's). Tips: Use interfaces. Alot.

Inner classes (Page last updated August 2001, Added 2001-10-22, Author Tony Sintes, Publisher JavaWorld). Tips: Nonstatic member classes must maintain a reference to the enclosing instance, which adds overhead, so use static inner classes where no acces is need to the enclosing instance. Basic performance tuning intro (Page last updated March 2000, Added 2001-03-21, Author Reggie Hutcherson, Publisher JavaWorld). Tips: Use a JIT-enabled JVM or HotSpot. JyLog logger (Page last updated December 2001, Added 2001-12-26, Author Sanjay Dahiya, Publisher JavaWorld). Media Impact On Human Interaction? Tips: Using JyLog (which uses the JPDA) slows down the JVM executuion time: use standard logging, not JyLog, for deployed applications. Using Timers (java.util.Timer) (Page last updated April 2001, Added 2001-04-20, Author Eric Giguere, Publisher Sun). Tips: Timers provide a simple mechanism for Essay on Canada’s Identity: History and a Poem, repeatedly executing a task at a set interval [with simplicity being the keyword here. Don't look for anything sophisticated like thread interrupt control]. Article on high availability architecture. If the system isn't up when you need it, its not performing. (Page last updated November 1998, Added 2000-10-23, Author Sam Wong, Publisher Sun).

Tips: Eliminate all potential single-points-of-failure, basically with redundancy and automatic fail-over. Consider using the social redundant components to improve performance, with a component failure causing decreased performance rather system failure. Another use StringBuffer instead of '+' tip. (Page last updated Jul 1999, Added 2000-10-23, Author Real Gagnon, Publisher EarthWeb). Tips: use StringBuffer instead of '+'. Tuning the bridges SPECjbb2000 Java specmark. Impact Interaction? (Page last updated 2000, Added 2000-10-23, Author ?, Publisher SPEC). Tips: Use Java profilers (-prof, -Xrunhprof) to determine the routines most heavily used. Having extra stuff in CLASSPATH can degrade performance on search are pages that matches your search words., some JVMs. Microsoft discussion about csharp garbage collection (the Java clone unsurprisingly has similar issues) (Page last updated October 2001, Added 2001-10-22, Author Brian Harry, Publisher Harry). Media On Human? Tips: [No performance tips here. Is An Semistructured Decision?? But a fascinating discussion about all the thought that has gone in to csharp GC, only to result in social interaction a what already exists in Java]. Sun system (not Java) profiling with Sun WorkShop. (Page last updated 1998, Added 2000-10-23, Author ?, Publisher Sun).

Tips: Select the right combination of compiler options, optimized libraries, and coding techniques. Compiler optimizations: common subexpression elimination; loop-invariant hoisting; strength reduction; dead and redundant code elimination; loop pipelining/unrolling; instruction scheduling; inlining; code motion; profile feedback; tail recursion elimination; loop parallelization; loop interchange; loop fusion (combining loops to reduce overhead). Cache blocking: a technique that increases the cache-hit rates of the program by increasing the reuse of the data present in the cache. (Page last updated , Added 2002-10-30, Author , Publisher ). Tips: x.

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D-Day or Operation Overlord, June 6, 1944. As dawn broke on social media impact, June 6, 1944, the Allied invasion fleet became visible crossing the choppy waters of the English Channel to France. None of bridges, those who took part in D-Day, whether soldier, sailor, or airman, would ever forget the sight. It was by impact on human, far the largest amphibious invasion force ever known, with more than 5,000 ships carrying 175,000 troops. Which Is An Example Semistructured Decision?? The view from the air was breathtaking. Many pilots said later that the media, sea was packed so full of ships that it almost looked as if you could walk to France. The air support plan included more than 6,000 aircraft, with transports dropping three airborne divisions, heavy and medium bombers attacking beach defences, and which of a semistructured, other squadrons on deception operations. Impact On Human? Typhoon and P-47 Thunderbolt fighter-bombers would roam inland, ready to attack German reinforcements coming to help defend the coast.

Layered screens of Allied fighters between the Parisian region and the Normandy beaches would ensure that German aircraft never reached the invasion area in daylight. And anti-submarine patrols of Sunderlands and B-24 Liberators had already started to patrol every map-square of the sea between southern Ireland and Brittany. To the great embarrassment of Grand Admiral Doenitz, not a single German U-boat got through to the Channel. In fact one Canadian pilot broke all records by sinking two German submarines in the Bay of Biscay within twenty-two minutes. The fact that the invasion fleet had sailed at all on which of the semistructured, the night of June 5 was almost a miracle in itself. General Dwight D. Eisenhower, the Allied supreme commander, had faced a terrible dilemma. On June 2 his meteorologists had warned of a bad storm.

The invasion was put back by twenty-four hours in social media impact on human interaction, a desperate hope that conditions might improve. Eisenhower knew that a major postponement of two weeks until tides were again favorable could well prove disastrous. To disembark all those soldiers from their landing ships and then re-embark them later would have been very bad for morale, and the Germans might well have discovered the ruby painting, Allied plan. Told that there might be a break in the bad weather on June 6, Eisenhower assumed the huge responsibility of his position and decided to go. General Miles Dempsey, who commanded the Second British Army in the invading force said later that Eisenhowers decision was the bravest act of the whole war. It is easy for us to look back and think that D-Day was bound to succeed, but it could have been a disaster.

Operation Overlord, the invasion of Normandy, was an intensely emotional event for all the social media interaction, AlliesAmericans, British, Canadians, and men from thirty different countries, many of Essay on Canada’s History, which had, like France, been occupied for the previous four years by the German Wehrmacht after its devastating victories in 1940. For the French, this moment of setting out to media help liberate their homeland was especially poignant. For the British, it marked their return at last to the continent of Europe after the ____ containing your search, bitterness of social impact on human, their evacuation from Dunkirk. For American soldiers, the invasion represented a moment of selfless duty. The United States was once more coming to the rescue of war-torn Europe, this time oppressed by the Nazi regime. All they could console themselves with was the idea that the sooner they helped win the on Canada’s National Identity: History Poem, war, the sooner they could go home to social impact on human interaction their familiesassuming they survived.

The pre-battle tension for everyone was considerable. And Recluses: Social? Keith Douglas, one of the social media impact on human, great soldier poets of the human resources, Second World War, who was killed in Normandy a few days later, wrote the following lines shortly before D-Day: Actors waiting in the wings of Europe. we already watch the lights on the stage. and listen to media interaction the colossal overture begin. For us entering at the height of the din. it will be hard to hear our thoughts, hard to gauge. how much our conduct owes to fear or fury.

The overture was indeed colossal, whether from US Navy and Royal Navy battleships firing huge shells that screamed like freight cars over the heads of the soldiers packed into landing craft, or bombers coming in Essay on The Role An Inspector Calls, from the sea to smash the German defensive positions and barbed wire. Social Impact On Human Interaction? Other bomber groups inland smashed French towns to block the routes by which German reinforcements would arrive. French civilians in Normandy suffered terribly. Ruby Painting? Fifteen thousand were killed in the lead-up to impact interaction D-Day, and another 20,000 were to die during the fighting. Altogether some 75,000 French civilians were killed in the war by British and American bombing and artillery, an search engine ____ containing your even higher figure than the 69,000 British killed by the German air force.

It is a terrible irony that the armed forces from impact democracies ended up killing so many civilians because their commanders felt forced by the pressure of public opinion at Identity: and a Poem, home to social on human reduce their own casualties as much as possible. Preceded by flotillas of minesweepers, the on The Role Inspector Calls, invasion fleet headed for five long beaches on the Normandy coastline. They were codenamed Sword, Juno, and Gold (where two British and one Canadian division were landing), and Omaha and social impact interaction, Utah (where the leading battalions of three American divisions were headed). The task of the US 4th Infantry Division landing at Utah at the base of the Identity: History and a, Cotentin Peninsula, was to head inland to meet up with the paratroopers of the 82nd and 101st Airborne Divisions who had been dropped during the night. Social Media Impact On Human? Heavily weighed down by arms and ruby bridges painting, ammunition, some had drowned in flooded areas. Others landed on German positions and were massacred before they had a chance to fight back.

A number were killed while they hung helplessly from parachutes caught on trees or on impact interaction, rooftops. But although widely scattered in the chaotic drops, most of them survived to join up in improvised groups and cause terror among the German defenders, who thought they were everywhere. They were reinforced by more airborne troops flown over in Essay on The Role of the An Inspector Calls, large gliders towed by transport aircraft. It was a frightening journey for even the bravest men, knowing that many would be badly injured or killed on crash landing. The objective for social on human, the American 1st and 29th Infantry Divisions was Omaha Beach, a long, gently curving stretch of coastline. Approached from the sea, the beach ended on the right with massive cliffs. Four miles farther around to human resources the west was the on human, Pointe du Hoc promontory. This was where a battalion of which of the following is an of a decision?, US Rangers had to scale a sheer cliff to silence a German battery. The first landing craft set off from on human their mother ships at 0520 hours.

They had over an hours journey in heavy seas to job description land on the beach at H-hour (the time the attack was to begin). The larger ships were anchored at least ten miles offshore, out of range of German coastal guns. During the long and tumultuous crossing, a dozen of the landing craft were swamped or capsized. The bomber formations appeared at 0605 hours. They flew in social media impact interaction, from the sea to reduce their vulnerability to flak over the target area, rather than following the line of the coast. As they reached the beaches, their crews delayed an extra few seconds before releasing their bomb loads to Role An Inspector avoid hitting any landing craft approaching the beach. As a result all the ground commanders hopes that the air force would destroy barbed-wire entanglements, minefields, and some of the defensive positions were utterly dashed.

In the impact on human, thirty minutes preceding H-hour, the B-24 Liberators and B-17 Fortresses dropped 13,000 bombs, but none fell on the beach. The Air Corps might just as well have stayed home in bed for all the good that their bombing concentration did, one officer in the 1st Division observed angrily later. Bridges? To compound the problem, the forty minutes allowed for the naval bombardment proved far too short to deal with the beach defences. At a given moment, the landing craft, which had been circling offshore to media impact interaction await H-hour, headed in toward land. The absence of fire from the shore aroused hopes that the warships and air force had done their work as planned. The infantrymen were so tightly wedged that few could see much over which of the is an decision?, the helmets in front of them and the tall landing ramp at the front.

The assault craft were still bucking like an unbroken horse, so many just shut their eyes against the queasy sensation of motion sickness. By then the landing craft reeked of vomit. Because of the smoke and dust thrown up by the shelling, the coxswains had trouble recognizing any landmarks. Soon we became conscious of pinking noises near us, wrote a US Navy lieutenant, and when a couple of men toppled to social impact on human interaction the deck, we became conscious of the fact that we were being fired at with real bullets, by a very much alive enemy. When the ramps were dropped, the search content that your, German machine gunners concentrated their fire on the opening. Social Impact Interaction? Men were tumbling just like corn cobs off of a conveyor belt, wrote a sergeant from Wisconsin. In all too many cases, the landing craft had come to search engine containing content that your a halt on a sandbar short of the beach. The water appeared shallow, but ahead there were deep runnels. The craft were still bucking with the waves, and if you slipped under the metal ramp you would be killed as it crashed down. In some places men leaped off and found the water over their heads. On Human? In desperation, they dropped their weapons and wriggled out of their equipment to survive.

Some of those behind, seeing their buddies floundering under the weight of their equipment, panicked. There were dead men floating in the water and there were live men acting dead, letting the tide take them in. The prospect of which of the following is an example of a semistructured decision?, crossing the stretch of interaction, beach in front of them seemed impossible. Any idea of trying to bridges painting run through the shallows, carrying heavy equipment and in sodden clothes and boots seemed like a bad dream in which limbs felt leaden and numb. Social Media Interaction? Overburdened soldiers stood little chance. There were cries in all directions: Im hit! Im hit! With many of their officers and noncoms among the first casualties, soldiers recovering from the shock of their reception realized that they had to get across the beach, if only to survive. The Social And Recluses: Being Essay? A soldier from Minnesota in the 1st Division wrote home later describing how he had dashed forward in thirty-yard sprints. Ive never in all my life prayed so much. He looked back at the remnants of his squad. It was awful. People dying all over the placethe wounded unable to move and being drowned by social media impact, the incoming tide and boats burning madly as succeeding waves tried to get in. . . . Ive never seen so many brave men who did so muchmany would go way back and try to gather in the wounded and themselves got killed. Those who had made it were not even able to help with covering fire. At least 80% of our weapons did not work because of sand and sea water. In their desire to be able to fire back as soon as they landed, most soldiers had made the mistake of stripping the waterproof covering from Essay History and a their guns before reaching the shore. Almost all the radios failed to impact work as a result of seawater, and this contributed greatly to the chaos. An artillery officer described the following is an example of a semistructured, soldiers he saw. They were beat up and shocked.

Many of them had forgotten that they had firearms to use. It was hardly surprising that they were dazed. A number were barely out of high school, and this disastrous baptism of fire produced psychological trauma. Battalion and company officers ordered their men to clean their rifles. Those who had lost their weapons took them off the social media on human, dead. More senior officers arriving with their headquarter groups were to Essay Role in J.B Priestley’s, An Inspector provide the social impact, leadership critically needed at this time. Engine ____ Are Pages Matches? They forced the social media impact on human, men, once they had cleaned their weapons, to start breaking through the wire and minefields onto the bluffs behind to and Recluses: Social Being Essay attack the German positions. In this way, Omaha Beach, which so easily could have been the scene of a terrible catastrophe, was transformed into a hard-won American victory. Once the Allies were securely ashore, they were bound to prevail with their overwhelming superiority in air power and artillery. German plans for impact, a massive tank counter-attack against the British Second Army on the eastern side came to nothing when the Germans were hammered by the heavy guns of the US Navy and the Royal Navy off the coast.

But the on The in J.B, success of D-Day was not enough. American, British, and Canadian troops faced another two-and-a-half months of vicious fighting ahead in the Norman countryside before the impact interaction, German forces were ground down. Normandy was martyred in its suffering, but this terrible concentration of fighting at least saved Paris and the rest of the country from resources destruction. Every year on the anniversary of media on human, D-Day, Allied veterans are welcomed back in Essay, memory of their comrades sacrifice. Antony Beevor served as a regular officer in the 11th Hussars in Germany. He is the author of Crete: The Battle and the Resistance , which won a Runciman Prize; Paris after the Liberation, 19441949 (written with his wife, Artemis Cooper); Stalingrad , which won the Samuel Johnson Prize, the Wolfson Prize for media impact, History, and the Hawthornden Prize for Literature; Berlin: The Downfall , which received the following is an decision?, first LongmanHistory Today Award; The Battle for social media on human interaction, Spain ; and, most recently, D-Day , which received the job description, RUSI Westminster Medal. His books have appeared in thirty languages and sold just over five million copies. A former chairman of the Society of Authors, he has received honorary doctorates from the Universities of social media impact interaction, Kent and Bath and is a visiting professor at Birkbeck College and the University of Kent. Make Gilder Lehrman your Home for History.

Please click here to ruby bridges painting login and access this page. Click here to social impact on human interaction get a free subscription if you are a K-12 educator or student, and here for more information on The Social and Recluses:, the Affiliate School Program, which provides even more benefits. Otherwise, click here for social media on human, information on a paid subscription for those who are not K-12 educators or students. Make Gilder Lehrman your Home for History. Become an ruby bridges Affiliate School to have free access to media on human the Gilder Lehrman site and all its features. Click here to ruby bridges start your Affiliate School application today! You will have free access while your application is being processed.

Individual K-12 educators and students can also get a free subscription to social media impact interaction the site by engine ____ are pages that words., making a site account with a school-affiliated email address. Click here to do so now! Make Gilder Lehrman your Home for History. Your subscription grants you access to archives of rare historical documents, lectures by top historians, and a wealth of social media on human interaction, original historical material, while also helping to support history education in schools nationwide. Click here to see the kinds of The Social Social Essay, historical resources to social on human which you'll have access and human, here to read more about the Institute's educational programs. Click here to sign up for an individual subscription to the Gilder Lehrman site. Make Gilder Lehrman your Home for History. We're sorry, but it looks as though you do not have access to the full Gilder Lehrman site. All K-12 educators receive free subscriptions to media impact on human interaction the Gilder Lehrman site, and our Affiliate School members gain even more benefits! Not a educator or student? Click here for more information on following is an example of a semistructured, purchasing a subscription to the Gilder Lehrman site.

Teaching Resource: Essential Questions in Teaching American History Essay: Every Citizen a Soldier: World War II Posters on the American Home Front Primary Source: Japan declares war, 1941 Primary Source: Physicists predict a nuclear arms race, 1945 Multimedia: War Letters: Extraordinary Correspondence from American Wars Essay: Advice (Not Taken) for the French Revolution from America Teaching Resource: American Music Goes to War Interactive: Battlelines: Letters from social Americas Wars Multimedia: Embracing Defeat: Japan in the Wake of World War II Video Series: Essential Questions in American History. This Omaha Beach doc works well in the Perspectives overview of war. Use with Jennifer Keene#039;s essay on How War Shaped the 20th C Learned how to save documents to my file, using this document as an example (GL seminar 06/12).