Measuring page performance

Question

What tool would I use to measure the time taken for a page to load in ASP.NET that has multiple ajax requests along with synchronous execution on the server and client side logic.

I am interested in calculating the time taken to load the complete page (including the last ajax call). I understand I can use firebug only for XmlHttpRequest times, but I am not aware of a tool that calculates the synchronous time as well as accurately as possible.

Answer 1

YSlow by Yahoo is a pretty good developer tool for this kind of performance testing.