Re: Slow performance on windows. Any way to make it faster?

[Uwe R. <Uwe...@ti...>]

Hi Doug,

> I don't have an X11 platform to test on.  I will re-install Qt3 on my
> Windows box, hopefully later this week, for this test.

Ok here is the answer from TrollTech:

| We have had issues with polygons on X11 when Xrender wasn't hardware
| accelerated (fixed for 4.2) - or when a very large polygon is drawn
| (fixed for 4.3).
|
| Generally there are a number of improvements in our tesselator code in
| Qt 4.3 so we hope that this will improve things considerably.

Looks like the Qt3 test is not necessary anymore,  but could you repeat your 
test on Windows with a Qt 4.3.0 snapshot ?

> It would be good to test just the QPolygon on its own, without Qwt, to see
> if it gives the same results.  I will try that when I find time, unless
> someone else does it first.

Could you also send me the code of your application, that you used for your 
measurements ? Then I will try to check X11 + make some tests to optimize the 
polygon sizes for Qt 4.2.

Uwe