© 2011 Cognifide Limited. In commercial confidence only. Client-side performance testing Jacek Maciejewski QA Engineer.

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Presentation transcript:

© 2011 Cognifide Limited. In commercial confidence only. Client-side performance testing Jacek Maciejewski QA Engineer

© 2011 Cognifide Limited. In commercial confidence only. What is client-performance? Tools Continuous testing Agenda

© 2011 Cognifide Limited. In commercial confidence only. Client-side performance

© 2011 Cognifide Limited. In commercial confidence only. What is it? simply: time it takes for browser to render a page influenced by: −number of assets −javascripts −server configuration

© 2011 Cognifide Limited. In commercial confidence only. Why is it important? influences how a user see a page / brand 25% of people abandon the page if it does not load within 4 seconds every extra secont of loading equals 7% less conversion rate Amazon would lose 1.6 billion$ per year if their website loads 1 second longer Google would get 8 mln requests less every day if it was slower by 0.4 second. Making Barack Obama’s website 60% faster increased donation conversions 14% Google’s page rank is partially determined based on performance

© 2011 Cognifide Limited. In commercial confidence only. Tools

© 2011 Cognifide Limited. In commercial confidence only. Tools Firebug / Developer Tools Google Page Speed Yslow Gtmetrix.com (YSlow and PS together) Google Speed Tracer ajaxDynaTrace WebPageTest.org

© 2011 Cognifide Limited. In commercial confidence only. Tools – browser timings window.performance.timing W3C standard supported in every modern browser

© 2011 Cognifide Limited. In commercial confidence only.

How to automate?

© 2011 Cognifide Limited. In commercial confidence only. Automation Browser Timings are easy to use with Selenium WebDriver HAR Logs −From Firebug (Net panel + NetExport plugin) −From BrowserMob (proxy) − possible to integrate Google PS with automation frameworks WebPageTest – API performance logs from the newest Chrome Driver (

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