Quote Originally Posted by wysota View Post
I really suggest to recompile Qt with profiling information. You're shooting blind now. Profiling will give you the exact bottleneck point. Furthermore make sure your app is compiled correctly, I think you should be able to have a decomposition of the drawBackground() method in the profiling information as well. It should then tell you which part of the method takes most time and it should be possible to obtain without recompiling Qt.
ok finally I agree. You are right . I guess there is no decomposition because most method are inlined. Well I'll do that recompilation tomorrow(nice job in the weekend )