Measuresharepointperformance

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Measuresharepointperformance

  1. 1. WWW.GETRPO.COM RUNTIME PAGE OPTIMIZER MEASURE SHAREPOINT PERFORMANCE “Fast is better SharePoint is recognized as the gold standard for developing rich sites that connect than slow” businesses to their customers across the globe. A high performing SharePoint intranet or internet site creates an important first impression for visitors. On the web, fast is better than slow. Is your SharePoint site fast or slow? The challenge in answering this question has been the limited availability of tools and methodologies for accurately measuring page load speeds as users experience them in the real world. This paper introduces guidelines for setting page load goals, demonstrates the latest technologies for measuring your site’s speed and introduces the Runtime Page Optimizer a new component for increasing the performance of SharePoint sites. 1: Page load goals “Thirty-three As businesses increasingly use SharePoint for intranets and internets, page load times percent of need to fit to industry standards set by internet sites. The following goals are based on consumers accredited industry research for internet sites and are equally applicable to intranets. shopping via a Page load goal: 4 seconds broadband Based on research from Jupiter and Akamai, “Thirty-three percent of consumers connection will shopping via a broadband connection will wait no more than four seconds for a Web wait no more page to render”. For page load times, four seconds is the current goal to aim for. than four seconds for a Page load upper maximum: 8 seconds ii Web page to The “8 second rule” was proposed by Zona Research in 1999. A decade ago in the i render” days of pre-Pentium computers and dial-up, this was an admirable standard to achieve; today it should serve as a maximum wait time after which people will leave wondering if the site is broken. Exceptions: warm-load and processing pages The two exceptions are warm-load (when someone navigates back to a previous page – these pages need to load in under two seconds. Processing pages such as credit card validation or signing in can take longer – people expect to wait if they perceive the website is doing some work requested on their behalf. Based on these, we recommend the following goals for an average user with a broadband connection:
  2. 2. WWW.GETRPO.COM RUNTIME PAGE OPTIMIZER MEASURE SHAREPOINT PERFORMANCE Page type A: Great B: Fair C: Bad First time visit (no cache) < 4 seconds 4–8 > 8 seconds seconds Warm load (primed cache) < 2 seconds 2–8 > 8 seconds seconds Processing page < 4 seconds 4 – 15 >15 seconds seconds 2: Measure your SharePoint site’s speed The only meaningful measurement of a page’s speed is how fast a page loads in a customer’s web browser from their location – network latency plays a huge role in page load times, and measuring speed from a PC located close to the web server does not capture the real-world travel time over the internet. We recommend using one of two methods for measuring a page’s speed: a) If the SharePoint site has internet-facing public pages, use the AOL Page Test to measure page load times from Dulles, VA, USA. This is a free website where you enter your site’s URL, and the server loads the page with Internet Explorer and displays the results after a few seconds. b) If the SharePoint site is an intranet or non-public site, use either Microsoft Internet Explorer or Mozilla Firefox to measure the local page load time and apply a multiplier to estimate the load time for users accessing the site remotely. Before we start, let’s familiarize ourselves with the Waterfall diagram (shown right). This is a standard diagram produced by performance measuring tools. The Y axis shows the files (requests) in the order they were loaded. The X axis shows elapsed time. In the image to the right, the HTML page for www.aol.com is loaded first, then the CSS files, JavaScript files and images. The HTML, JavaScript and CSS files are loaded sequentially one-after-the-other, while several images are loaded in parallel. Server-based testing: AOL PageTest The AOL PageTest is a free over-the-web tool for performance testing a page from either Dulles, VA, USA or Wellington New Zealand. Page 2 of 4 Version 1.1 Copyright © 2008 Aptimize Limited
  3. 3. WWW.GETRPO.COM RUNTIME PAGE OPTIMIZER MEASURE SHAREPOINT PERFORMANCE To use the AOL PageTest: 1. Go to www.webpagetest.org (USA), or www.webpagetest.org.nz (New Zealand) 2. Type in your site address, e.g. www.aol.com, then click the Submit button. 3. The page will refresh a few times then show you the cold and warm load times for the page with a waterfall diagram. The AOL page test is more accurate than most web-based tools a real browser to measure load times – many other web-based tools approximate load times by parsing HTML files. Client based testing: httpWatch and Firebug Neither Microsoft Internet Explorer or Mozilla Firefox have capabilities for measuring a page’s speed, but there are add-ons available for each that produce waterfall diagrams and page load diagrams. We recommend using either tool to measure page load times from a client: Microsoft Internet Explorer versions 6,7 or 8 Mozilla Firefox versions 2,3 httpWatch is an affordable extension for Internet Firebug is a free extension for Firefox that gives Explorer that gives page load timings and analysis page load timings and a number of development of requests, available from www.httpwatch.com. capabilities, available from www.getfirebug.com. Because these tools give you the timings from your local machine, you need to apply a multiplier to estimate the effect of network latency for remote users: 1. Use Microsoft Internet Explorer with httpWatch or Mozilla Firefox with Firebug to measure the page load time from “onsite” – a workstation physically close to the web server. This is your local page load time. Page 3 of 4 Version 1.1 Copyright © 2008 Aptimize Limited
  4. 4. WWW.GETRPO.COM RUNTIME PAGE OPTIMIZER MEASURE SHAREPOINT PERFORMANCE 2. Apply the following formula to estimate the effect of network latency for a user located with a 1Mb connection located within 1,000 miles of the server: = + + 33 150 For example, suppose you have a 0.5 second local load time, and the page has 20 requests and is 350KB in size, the page load time would be: 20 350 0.5 + + 33 150 this equals 3.439394 seconds. 3: Analyze your page load time If your page load time doesn’t meet an acceptable goal, you can quickly make an analysis using the page load waterfall diagram to see where the problem is. Page load time is governed by:  Backend processing. The time it takes for a SharePoint to process the HTML page only.  Frontend processing. After the HTML page is loaded, the time it takes for the browser to render the HTML and load all the page resources – JavaScript, CSS, and images. Backend Frontend If backend processing is taking too long, adding hardware and tuning the SharePoint page composition will improve the page load time. If frontend processing is taking too long applying frontend optimization techniques will reduce the page load time. Typically, backend processing contributes 10% to the page load time, and frontend processing contributes 90% to page load time. If you need to tune frontend processing, try a free trial of the Runtime Page Optimizer – a software component that automates many of Yahoo’s “best practices for speeding up websites”, increasing the quality and performance of webpages and lowering data traffic costs. Now available for SharePoint 2007 and ASP.NET sites. See www.getrpo.com. i http://www.akamai.com/dl/reports/Site_Abandonment_Final_Report.pdf ii http://www.keynote.com/docs/whitepapers/zona_need_for_speed.pdf Page 4 of 4 Version 1.1 Copyright © 2008 Aptimize Limited

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