Today i have noticed that google introduced a new tool, which used to measure Site Performance. The tool located under the labs portion in the Webmaster Tools. Looking at my own graph, it appears they have been tracking average load times since the end of September. For this site, the average load time is 31.5 seconds. I am not happy with this rate because it is too high, it should be 1-3.

Site Performance is an experimental Webmaster Tools Labs feature that shows you latency information about your site. (To see Site Performance data, you must add and verify your site in Webmaster Tools.)

Download page for Google’s Page Speed: Install Page Speed