Tech & Biz

Yahoo Releases Yslow, A Firefox Extension For Debugging And Improving Website Performance.

by meyers | July 25, 2007 at 12:07 pm

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I'm sure you've noticed our pages are loading a LOT faster now then they did a few weeks ago... this is a result of much backend work; now we are focusing more on the front end and we are playing with YSlow to continue to improve on our page load times - will keep you posted on this effort.

Yahoo! released YSlow, a Firefox extension that integrates with the popular Firebug tool. YSlow was originally developed as an internal tool at Yahoo! with the help of Steve Souders, Chief Performance at Yahoo! and author of O'Reilly's High Performance Websites book.

YSlow analyzes the front-end performance of your website and tells you why it might be slow. For each component of a page (images, scripts, stylesheets) it checks its size, whether it was gzipped, the Expires-header, the ETag-header, etc. YSlow takes all this information into account and computes a performance grade for the page you are analyzing.