GraphicsView performance problems

**camel** · 17th February 2007, 14:27

Well...[CUT BECAUSE SOMETHING WEIRD IS GOING ON...it seems to be as if drawing the lines one by one is faster...but somehow that is rather unbelievable on second thought]...

Another method of getting rid of spurious mallocs is to reuse Pens and Brushes...

I guess i will not repost all of the code for these little changes...

Does anyone has access to a profiler on windows/mac? I would like to know if those changes that were good for linux (ellipses, rect -> painterpath) lines drawn one by one, is also good for these palatforms ;-)

**Gopala Krishna** · 17th February 2007, 14:33

Originally Posted by camel

Well, after some more testing I found out that it is cheaper (in the drawBackground) method to draw the lines one by one, than to regenerate a new painterpath everytime.

Another method of getting rid of spurious mallocs is to reuse Pens and Brushes...

I guess i will not repost all of the code for these little changes...

Does anyone has access to a profiler on windows/mac? I would like to know if those changes that were good for linux (ellipses, rect -> painterpath) lines drawn one by one, is also good for these palatforms ;-)

Yeah exactly I too would like to know opinion on windows especially. Did anyone notice performance difference between windows and linux when you select and move all items ?