Re: [260.19.12] GTK Xorg 1.9 performance regressions
I am experiencing the same issue. What I did to alleviate the issue somewhat was to go from a high glossy gradient look to plain (clearlooks -> clearlooks classic.) Now its still half the speed of what it usually is but better than the 4 times slower that was with the heavy glossy look.
Hopefully this will give some ideas where things got out of hand in the code.