Yahoo release a web site evaluation tool called YSlow

YSlow is a new web tool published by Yahoo. It let you test a total of 13 rules against your web site to check if it is efficient.   YSlow analyzes web pages and tells you why they're slow based on Yahoo's rules for high performance web sites. YSlow gives you: * Performance report card * HTTP/HTML summary * List of components in the page * Tools including JSLint Thirteen Simple Rules for Speeding Up Your Web Site  High Performance Web Sites Use a Content Delivery Network Add an Expires Header Gzip Components Put CSS at the Top Move Scripts to the Bottom Avoid CSS Expressions Make JavaScript and CSS External Reduce DNS Lookups Minify JavaScript Avoid Redirects Remove Duplicate Scripts Configure ETags   More about YSlow: https://addons.mozilla.org/en-US/firefox/addon/5369 More about 13 Rules: http://developer.yahoo.com/performance/rules.html Reference: http://weblogs.asp.net/lkempe/archive/2007/08/19/yahoo-release-a-web-site-evaluation-tool-called-yslow.aspx