What is a good tool or site to use to performance test a web page/site? [closed]

Question

What is a good tool or site to use to performance test a web page/site? I am trying to find a good baseline to detect how fast my page will load on one hosting provider vs another. I initially used http://www.freespeedtest.com/ but like to get opinions and links for others.

Answer 1

I use Firefox with the FireBug and YSlow plugins installed.