My application in 4.6 rc1 is less responsive than in 4.6 beta1 and earlier versions. The difference is sensible. What I mean by "less responsive" is that the paint events don't come as fast as before. The painting code itself is fast as before (benchmarked). This is only under Windows. On OSX I note no difference between beta1 and rc1.
I remark this problem like this: I use the mouse to edit a large graphics and some QWidget::update() calls are often performed. Though the paint() is benchmarked to be as fast in rc1 than in beta1, the screen updates are roughly twice slower. The resulting feeling is that the graphics are slower. I have measured how often the paint() is called in rc1 versus beta1 (while doing my mouse editing described above). In rc1 in general, the output is like this: paint() 7 ms paint() 25 ms paint() 7 ms paint() 25 ms 7 ms paint() 25 ms ...etc. While in beta1: paint() 7 ms paint() 10 ms paint() 7 ms paint() 10 ms 7 ms paint() 10 ms ...etc. The figures I get for beta1 are more regular than in rc1. It's often the same. In rc1, I wrote "25 ms" above but it's rather 25 then +-20 then +-30 etc... not as regular. If you count, you see that paint() is called about twice less. Hence the clear feeling of a slower appication. I remember the note you issued with rc1: "We have redesigned the event processing quite extensively to improve the reliability of timers." And I am afraid your fix has made the situation worse for me. Any hint about what was done or how I could find the same "responsiveness" as before? Should I create a new issue in the Qt Bug Tracker? Thanks Philippe _______________________________________________ Qt4-preview-feedback mailing list [email protected] http://lists.trolltech.com/mailman/listinfo/qt4-preview-feedback
