Without compiz: jan@jan-x61:~$ glxgears 2798 frames in 5.0 seconds = 559.539 FPS 2671 frames in 5.0 seconds = 533.488 FPS 2760 frames in 5.0 seconds = 550.889 FPS
With compiz: jan@jan-x61:~$ glxgears 2293 frames in 5.0 seconds = 458.450 FPS 2360 frames in 5.0 seconds = 469.041 FPS 2300 frames in 5.0 seconds = 459.050 FPS
So the framerates are about the same.
Without compiz:
jan@jan-x61:~$ glxgears
2798 frames in 5.0 seconds = 559.539 FPS
2671 frames in 5.0 seconds = 533.488 FPS
2760 frames in 5.0 seconds = 550.889 FPS
With compiz:
jan@jan-x61:~$ glxgears
2293 frames in 5.0 seconds = 458.450 FPS
2360 frames in 5.0 seconds = 469.041 FPS
2300 frames in 5.0 seconds = 459.050 FPS
So the framerates are about the same.