Here are some testing runs where GtkPerf was used. If you have some nice results of your own, please send them for me and I'll put them here!

GTK+ themes I decided to test how well different GTK+ themes perform. Does theme have a big impact on general GTK+ speed? KG
NVIDIA Xserver driver I have NVIDIA Geforce2 MX display card and wanted to test how much Xserver driver/settings affect to performance. KG