For public page, I can use pingdom.com to calculate the response time/uptime of a page over a certain period of time.
However, pingdom cannot time the response time of a webpage guarded behind a login page. For example, pingdom cannot check the response time for my Gmail inbox, as I would need to supply my gmail username and password to pingdom if I want that.
Is there anyway I can get the webpage loading time for the webpage that requires a username/password pair?