php page appears to be being cached in browser, but shouldn't be...

Hi,

I’m trying to compare the front end timings between an old (and we believe quicker) version of our codebase on a slow server with our current set up which we believe is slower from a front end perspective, but on a fast server.

I am trying to simulate a logged in user who has visited a few pages already.

How come I never see the initial showthread.php timings? It’s almost like its caching the showthread page in the browser, but surely it shouldnt be doing that?

Here are a couple of tests, but they reliably show the same thing:

http://www.webpagetest.org/result/120626_86_JKM/1/details/
http://www.webpagetest.org/result/120626_8T_M8T/1/details/

Help greatly appreciated. Thanks

You probably want to look at different pages using showthread. There’s a good chance you are hitting the browser’s in-memory page cache.