Comment 28 for bug 1029085

No difference. I have tested it with two games, Minecraft and Trine 2, because you can see the frames per second ingame. You can use them too if you have a Nvidia GPU. When I start Trine 2 with Compiz (Unity or Fallback with Compiz), I have ca. 40fps but it feels more like 15-20. When I start the game with the same settings in Gnome-Shell or Fallback with no effects (Mutter and Metacity) I have the same 40fps as with Compiz but the game runs fine, no stuttering.

With more fps there is still stuttering but you can't really see it. I think, when a game runs with for example 60fps you don't really see stuttering although it's not completely smooth, it feels like 30fps (I can observe it with Minecraft sometimes because the frames per second are not stable there). When a game runs with 40fps, like Trine 2, it feels more like 15-20fps as I already mentioned. So the problem might be that games run like with 1/2 of the real fps.