On 04/03/2013 04:23 PM, Hans-Peter Jansen wrote:

What you see is possibly related to the default Qt graphics engine:
when using:

        QT_GRAPHICSSYSTEM=opengl python graphicsviewtest.py

the values are oscillating around 150 here. With "native" and "raster", it's
back to 25: openSUSE 12.2/x86_64, 2560x1600x32, nvidia proprietary graphics,

That's what I suspected initially. However, my graphics engine was set to native by default. I just tried all three engines:
* native: around 100ms
* raster: around 100ms
* opengl: greater than 300ms

I tested it on Arch Linux x86_64, 1920x1080, python2 2.7.3-4, sip 4.14.5-1, qt4 4.8.4-16, python2-pyqt 4.10-1.

That's really weird... I will try to set up an openSUSE box in my VirtualBox to see if that works.

Clemens
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