Yahoo! YSlow
YSlow analyzes web pages and suggests ways to improve their performance based on a set of
rules for high performance web pages. YSlow is a
Firefox add-on integrated with the
Firebug web
development tool. YSlow grades web page based on one of three predefined
ruleset or a user-defined ruleset. It offers suggestions for improving
the page’s performance, summarizes the page’s components, displays
statistics about the page, and provides tools for performance analysis,
including Smush.it™ and JSLint
MORE details on this link
http://developer.yahoo.com/yslow/
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