Unless I'm mistaken, there is no post caching (like in VB since 3.6 at least) in xenforo. On my install, the SQL takes around 5% of the CPU time, the rest is INTENSE cpu processing due to posts not beeing cached, I guess. And I'm using Xcache ! My XF is roughly 2 times slower than my previous VB3.6 installation, with render times around 300ms for a 20 posts page. (150ms or less for the same page in vb3.6) I see the same times here too (a 20 posts page takes 250ms to compute, for a logged in user.) Short story is ; it's way slower than older technology. It's a pity because the SQL part is much faster than vb3.6. The problem is, I think, the intense cpu computing on posts. Maybe the framework itself too... And this is on a dedicated dual 6 core opteron ! I read someone this was planned : is this still in everybody's minds ? PS Thanks for a great product - this is no criticism.