Comment 120 for bug 803943

Same problem here.
Compiz don't use a lot of cpu idle (2% constantly), but the smallest action take a LOT of cpu.
A simple tab in chrome whith a notification animation takes 50% of the cpu (because of compiz), a simple tab changing, a simple scroll, a simple dash open...

 In Ubuntu 11.10, compiz used 8 to 15% idle (so it's a lot better now), but a simple action didn't take such cpu consumption. Now my fans are crazy when I do a simple google search. It's not a medium importance bug, it's a HUGE problem.

It runs on a Dell Vostro 1320.

glxinfo | grep OpenGL
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 8400M GS/PCIe/SSE2
OpenGL version string: 3.3.0 NVIDIA 295.40
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler
OpenGL extensions: