[eva2000]

Originally Posted by diecastfast

As a follow-up, I pulled the plug on Page Speed and went back to Cloudflare. There are just too many oddities that happen with Page Speed, one of which is members complaining about pages "jumping" on tablets and mobile devices. Page Speed loads the first banner ad on my site last, so if someone is viewing below the fold, that ad loads and pushes everything down and it's annoying. Overnight I got about 10 emails from members complaining that vBulletin told them their IP address was banned. That was the final straw and I'm going back to Cloudflare. I should also mention that I ran GTMetrix tests three different times and none of them were faster than Cloudflare; all were the same or slightly slower.

I haven't used Google Page Speed service myself, but if it's anything like Apache mod_pagespeed or what I use for Nginx ngx_pagespeed modules by Google (i use ngx_pagespeed http://centminmod.com/nginx_ngx_pagespeed.html), then you need to fine tune the page speed filters for vBulletin usage. Some filters might need disabling so trial and error.

You can use http://www.webpagetest.org/compare to roughly check how your site will fair side by side with Google Page Speed service. Note aggressive versus default Page Speed option - aggressive has additional pagespeed filters which can break a site's functionality, so try both default and aggressive.

Also GTmetrix tests are test location dependent so will vary for different forums depending on where the forums' servers are located.