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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.itâ„¢ and JSLint.
Â· Added the ability to detect post onload components, including for pages that prevent itself from being embedded and/or iframed. (experimental)
Â· Support for 3 main rulesets: default YSlow V2, Classic V1 and Small Site or Blog and the ability to create new ones based on these 3.
Â· Offenders in CDN rule are now listed as domains only.
Â· Runs multiple YSlow instances (new windows). This feature is excellent for comparing YSlow results for different pages side-by-side.
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What's new What's new in version 3.0.0
No recent changes.
Technical information Requirements, supported languages and OS
- Supported OS: WinXP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64
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