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Google’s Page Speed Server Module Now Out Of Beta: mod_pagespeed
Google claims over 120,000 sites are currently using it to speed up their web sites.
Webmasters and server administrators can learn more about this server tool at developers.google.com/speed/pagespeed/mod.
As you know, Google finds page speed important. They use it as a factor in both organic and paid search. They have a page speed analytics tool in Webmaster Tools and several other tools to help webmaster measure their web page speed.