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mod_pagespeed is an open-source Apache module that automatically optimizes web pages and resources on them. It does this by rewriting the resources using filters that implement web performance best practices. Webmasters and web developers can use mod_pagespeed to improve the performance of their web pages when serving content with the Apache HTTP Server.

benchmark sur plusieurs sites qui confirme l'extrême irrégularité de mod_pagespeed à noter que les options agressives potentiellement dangereuses (mais intéressantes) n'ont pas été activées