On Mon, Aug 17, 2009 at 3:39 PM, Jan Hnatek<Jan.Hnatek at sun.com> wrote: > > > 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.
well, ATI doesn't have a DRI/DRM module on OSOL, unlike the NVIDIA drivers, so the performance on those types of operations are likely to suffer performance issues comparitively (to Nvidia)
