web-page-profiling

How do you profile your web site/web application ?

This is to collect from the experience that the community has done information on the aspect of Profiling web Application. Some years ago I worked at a very large project in C++/Java with the a CORBA ORB and we were using Rational Purify/CodeCoverage to instrument, detect memory leaks and discover bottlenecks on server code. From that t...