Ben Taylor wrote: > On Sun, Aug 16, 2009 at 10:29 PM, Pavel Heimlich<tropikhajma at gmail.com> > wrote: >> Hi, >> could be the relative slowness of KDE be caused by qt not compiled with >> mmx/3dnow/sse/sse2 ? >> the qt autodetection functions are tailored to gcc, so they fail with Sun >> Studio. Probably something like this >> http://lists.x.org/archives/xorg-devel/2009-April/000596.html patch would be >> needed. >> >> I know we basically force sse2 to everything, but could there be something >> that gets removed at the configure time? I haven't investigated into the way >> qt is built though, just asking. > > I understand that xrender has much more to do with kde4 performance than > any sse/sse2 optimizations. > > It may depend on what kind of video adapter you have, and whether or not > the driver supports xrender. If you have an ATI driver, I think you are going > to be out of luck.
I happen to have an ATI and there's a significant difference in performance, depending on what features are enabled. For instance, translucency is not 100% smooth, but it's usable, but the fade-in/fade-out or darken effects, as with logout dialog or Window Presentation, are rather laggy. hnhn -- Jan Hnatek jan.hnatek at sun.com
