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Is there Firefox addon to identify performance problems in web applications?

Is there Firefox addon to identify performance problems in web applications?

I want a Firefox add-on to know where time is being spent in my Web Application.

Asked by: Guest | Views: 63
Total answers/comments: 2
Guest [Entry]

"Check out Yahoo's YSlow, it works in combination with the Firebug Firefox addon.

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.

Another option is the Charles web debugging proxy. It's a very useful tool for web application development in general (both javascript and flash), and one of the features is a chart showing all the objects/requests loaded, and the time they take."
Guest [Entry]

There is the new Speed Tracer by Google.