site performance
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There are many variables that affect a site's performance. The tools listed below can help you discover those variables and improve your site. We recommend that you experiment with these tools. Multiple simple changes can improve the experience for your users around the world by several seconds.
Let's make the web faster - Google Code
YSlow for Firebug
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages . Feature highlights: Yahoo!'
ShowSlow
From ShowSlow Show Slow is an open source tool that helps monitor various website performance metrics over time. It captures the results of YSlow , Page Speed , WebPageTest and dynaTrace AJAX rankings and graphs them, to help you understand how various changes to your site affect its performance. ShowSlow.com is a demonstration site that continuously measures the performance of a few reference web pages. It also allows for public metrics reporting.
Page Speed