gtk2 performance depends much on cairo. I made some tests with different cairo versions and cairo 1.8.8 seems to be the fastest cairo version that works on Irix. A downgrade from nekoware current 1.10.2 works without problem for me. I build a highly optimized version with Mips Pro. If you are interested in this you can download it here:
ftp://3b1.de/diegel/neko_cairo-1.8.8.tardist
If you use this cairo version with firefox3 you may delete libcairo.so.3 in /usr/nekoware/lib/firefox-3.0.19. I had to install an older cairo lib in this directory, because firefox3 is not compatible with cairo 1.10.2 in nekoware current.
If you use this cairo version with firefox3 you may delete libcairo.so.3 in /usr/nekoware/lib/firefox-3.0.19. I had to install an older cairo lib in this directory, because firefox3 is not compatible with cairo 1.10.2 in nekoware current.