After today's upgrade of the package xserver-xorg-driver-ati to 1:6.9.0+git20081003.f9826a56-0ubuntu2, the compiz performance in EXA mode increases a lot. And the "MigrationHeuristic" option is no longer needed.
After today's upgrade of the package xserver- xorg-driver- ati to 1:6.9.0+ git20081003. f9826a56- 0ubuntu2, the compiz performance in EXA mode increases a lot. And the "MigrationHeuri stic" option is no longer needed.