Quote Originally Posted by ldesnogu View Post
The question here was not to measure exactly the impact of compositing by using glxgears, but to see there is an impact.

All we need to know is whether Michael left compiz on when running the gaming benchmarks.
Still glxgears is the wrong way to do this, because just running a DRI2 driver has an negative impact on glxgears, while real apps tend to be faster/not impacted.

glxgears just renders a very simply frame as often as possible so _any_ additional work could have a great impact on it.

So if you want to test the impact just use any real app.
It would be close to zero if measurable at all.