It's just a matter of application frame rates and the CPU consumption that compiz incurs (in compiz and Xorg processes). So on the Nexus maybe use glmark2-es and es2gears to look at frame rates.
A test for disabling XSync completely (which will cause bugs but be a great performance comparison) would be to write a stub XSync function and LD_PRELOAD it into compiz. I will try to do that soon.
Sean,
It's just a matter of application frame rates and the CPU consumption that compiz incurs (in compiz and Xorg processes). So on the Nexus maybe use glmark2-es and es2gears to look at frame rates.
A test for disabling XSync completely (which will cause bugs but be a great performance comparison) would be to write a stub XSync function and LD_PRELOAD it into compiz. I will try to do that soon.