Google Site Performance tool released
Google have added its site performance tool under Webmaster Tools. The tool is available under “Labs” menu, so it means its still in testing mode. See the image below 
The tool includes a graph of average page loads time. The stats shown are collected from visitors who use Google tool bar with PageRank option enabled. The graph gives clear idea how your site is performing for the visitors. see the image below 
Next part of the tool shows some tips to improve page load time based on Google Page Speed tool.
The release of the tool shows that Google likes faster sites from visitor point of view, and how important site performance can be in Google ranking. To read more how to improve site performance please follow Web Performance Optimization category.