Web Page Speed Checker is a plugin by sultanicq designed to control the Google Page Speed Score of your blog pages.
It connects with Google Page Speed Online to check different optimization rules and test it with your blog addresses.
This plugin alerts you with an email to let you fix any optimization problem that your daily basis may introduce in your blog.
Note: The admin of this plugin appears in French and seems to require an API to use.
Download and info: http://wordpress.org/extend/plugins/web-page-speed-checker/