Test on a 8500gt + nouveau + default settings

gtkperf:

GtkEntry - time: 0,02
GtkComboBox - time: 0,90
GtkComboBoxEntry - time: 0,48
GtkSpinButton - time: 0,08
GtkProgressBar - time: 0,07
GtkToggleButton - time: 0,39
GtkCheckButton - time: 0,08
GtkRadioButton - time: 0,13
GtkTextView - Add text - time: 0,38
GtkTextView - Scroll - time: 0,01
GtkDrawingArea - Lines - time: 0,72
GtkDrawingArea - Circles - time: 1,65
GtkDrawingArea - Text - time: 1,01
GtkDrawingArea - Pixbufs - time: 0,12
---
Total time: 6,06

oem@dub:~$ glxgears
2185 frames in 5.0 seconds = 436.860 FPS
2288 frames in 5.0 seconds = 457.463 FPS
2280 frames in 5.0 seconds = 455.975 FPS
2255 frames in 5.0 seconds = 450.936 FPS



and with settings disabled (the 4 opengl)

GtkEntry - time: 0,03
GtkComboBox - time: 0,81
GtkComboBoxEntry - time: 0,51
GtkSpinButton - time: 0,09
GtkProgressBar - time: 0,07
GtkToggleButton - time: 0,39
GtkCheckButton - time: 0,08
GtkRadioButton - time: 0,13
GtkTextView - Add text - time: 0,34
GtkTextView - Scroll - time: 0,32
GtkDrawingArea - Lines - time: 0,66
GtkDrawingArea - Circles - time: 1,24
GtkDrawingArea - Text - time: 0,68
GtkDrawingArea - Pixbufs - time: 0,09
---
Total time: 5,46


oem@dub:~$ glxgears
2007 frames in 5.0 seconds = 401.290 FPS
2269 frames in 5.0 seconds = 453.718 FPS
2253 frames in 5.0 seconds = 450.431 FPS
2276 frames in 5.0 seconds = 455.136 FPS
2286 frames in 5.0 seconds = 457.113 FPS
2296 frames in 5.0 seconds = 459.112 FPS

That is gtkperf is worst when settings are enabled