Comment 59 for bug 988079

An update: we tried upgrading the graphics card in the affected workstation from a Quadro FX 380 to a Quadro 600. This worked around the performance problems. With the new card, glmark2 runs smoothly within Unity, and Chrome runs well; it claims 60 FPS with the WebGL Aquarium demo running nearly full-screen, though it does appear to drop frames occasionally.

The Quadro FX 380 is admittedly a fairly old card, and I don't think it's worth investing a lot of time making things work flawlessly on it. However, I do believe the performance issues are indicative of problems with Unity+Compiz on older or slower graphics cards in general, and they should continue to be investigated.