This video shows you how to use JMeter to stress test your website or web application. JMeter is free and open source software, which you can download from http://jakarta.apache.org/jmeter.
In the first part of the talk, John reviewed the range of tools available to frontend engineers for unit testing and for analyzing the performance of code. In the latter case, he argues for going beyond pure speed-based benchmarks to structural analyses of performance. By looking at structure, the jQuery team was able to identify and correct bottlenecks, resulting in major performance improvements in the upcoming 1.4 release. In the second part of the talk (beginning at 49:20 in the video), John reviews some of those jQuery 1.4 changes. In the short third section (beginning at 1:03:15), he looks at some interesting trends he’s noticed in the practical application of new HTML 5 elements — especially in older browsers.
You serve up your code gzipped. Your caches are properly configured. Your data (and scripts) are loaded on-demand. That’s awesome—so don’t stop there. Runtime is another source of slowdowns, and you can learn to conquer those, too. Learn how to profile & benchmark your code to isolate performance issues, and what to do when you find them. The techniques you’ll learn range from the normal (clean up after yourself) to the extreme (unrolling loops).
* performance measuring: calling getTime() or using a browser extension like Firebug, plus performing complexity analysis,
* creating games: should be multiplayer, hard to cheat, available on all devices, and addictive,
* performing distributed testing to evaluate how a program or game works in a real set.
An interview/screencast with Steve Souders of the Yahoo! Exceptional Performance team and YDN, discussing YSlow. YSlow analyzes web pages and tells you why they’re slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool.keep looking »