Extension này hơi có vấn đề, lúc thì kết quả khác, lúc lại kết quả khác, các quy tắc cũng có đôi chút mâu thuẫn với nhau: lúc thì giảm request, lúc thì nên đặt bên ngoài. Cũng may là có mức độ ưu tiên, nhưng vẫn chưa có thang điểm để đánh giá

Steve Souders, performance architect at Yahoo!, announced today the public release of YSlow.

Stoyan Stefanov reviewed it briefly and gave tips for custom scoring at his blog.

What’s YSlow?

It’s an extension to Firebug (yes, correct, Firebug, not Firefox) that helps with performance optimization efforts. It scores your page on the scale A to F, based on compliance with Yahoo’s performance rules. It’s a tool that has been used internally at Yahoo and is now released to the world.

Steve is going to be speaking about YSlow at the Ajax Experience that just kicked off. I am looking forward to meeting him and check out the tool. We should give it a run on your sites and post how you did (don’t run it on Ajaxian ;).