Speed up your web pages with YSlow

Friday, 27 July 2007 21:38

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. YSlow gives you:

Performance report card
HTTP/HTML summary
List of components in the page
Tools including JSLint

Download HERE
Visit also the homepage of the team behind this tool: Yahoo!'s Exceptional Performance Team

You should not take too much time to guess that I am currently optimizing my homepage :-)
Be careful, running this tool more than 5 times make my Firefox crash ;-)

Some statistics:

forums.waltercedric.com Performance Grade: B (87), still working on it
www.waltercedric.com Performance Grade: B (83) was F before, still working on it
gallery.waltercedric.com Performance Grade: D (66), still working on it

Some useful links

ShrinkSafe is a JavaScript "compression" system. It can typically reduce the size of your scripts by a third or more, depending on your programming style.
mod_expires apache 2.0 modules documentation in order to reduce bandwidth
mod_deflate and mod_expires small howto
compressing javascript or how to compress javascript with htaccess, useful if you can't touch the apache configuration.

Be careful! a lot of host get pretty low metering (just test your favorite internet site), but are still very fast -> this tools do not tell You their infrastructure: memcache server, multiple db server, multiple file server for static content and so on...

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