Originally Posted by ledoc
There are occasional threads about something being slower or not accelerated any more after suspend. IIRC, the last one a few weeks back was about compiz getting slower (or opengl?). Not sure.
Anyway, you might find some more info on that buried in the forum.
I looked, couldn't find anything specific. I'm not seeing a difference in opengl so only basic 2d might be affected somehow.
Also, as someone else mentioned hyperthreading. I disabled it but in my case it made no difference.