On 12.07.2013, 3:16 Max wrote: And here are the results of my research: https://www.mediawiki.org/wiki/User:MaxSem/mod_pagespeed Briefly, this is interesting stuff, but not usable on WMF, or on any other large MW installations either. -- Best regards, Max Semenik ([[User:MaxSem]])

[cc'ing Joshua Marantz who leads the mod_pagespeed effort at Google, and Ilya Grigorik, their developer advocate for page performance] The principals behind mod_pagespeed, especially as they related to mobile page load performance as outlined in http://bit.ly/mobilecrp could themselves be implemented within mediawiki. mod_pagespeed itself can't just be dropped in to do the job, and especially doesn't play nicely with the full page edge caching wmf depends on; but it could be used as development guide. For mobile performance especially, the critical points are: * Everything needed to fully render above the fold content should fit within 10 packets, given our current 10 packet tcp initial connection window. * Those <= 10 packets must be in the service of a single request. * All css required by that above-the-fold view must be inline. It doesn't have to be all of the css required for the page overall. * Same with javascript - anything not essential to above the fold should be deferred. I can't think of any good reasons why this couldn't be implemented by MobileFrontend. Accomplishing all of what mod_pagespeed addresses for general mediawiki use would likely involve a rewrite of resourceloader. -Asher On Fri, Jul 12, 2013 at 3:03 PM, Max Semenik &lt;maxsem.wiki(a)gmail.com&gt; wrote: