Plugins for testing plugin or site stats?

Hi guys,

I like P3 Plugin Analyser, but I’m looking for something that provides more concrete information, especially around the number of http requests a plugin would make. I like to test my plugins to see how many requests they make, and how long they take to load.

It’s really hard, when you see a list of requests from a web tool, to know where the request originated from (plugin).

And, if there are any plugins to test site to find places where changes should be made to improve site speed and performance.

Thanks heaps!