Originally Posted by brewt
Does anyone still have the qtperf source code (the link isn't working for me)? I'm trying to figure out where sub-pixel rendering is slow. I loaded a file in kwrite, checked that it was doing sub-pixel rendering and scrolling and redrawing seemed pretty decent on my system (A64 X2 3800+, 6200 PCI-E).
The scrolling and redrawing is actually fine if your system specs are pretty good (which yours are), the problem is that scrolling or any kind of moving/redrawing eats up the cpu so if something else is going on that actually needs the cpu then one or the other is going to get affected. I never really notice a performance hit, what I notice is the cpu temp going up and the fan noise along with it while the vid card temps stay at their normal (high) temps.
The trolltech/kde problem theory is a bit comical too. Of course they should fix what's obviously their problem that only affects one hardware vendors cards of certain models with certain drivers... so obvious.