Hi,
is Qt 4.8 already allowing multiple threads to write into one opengl context?
If so it must handle this internal and this might generate some overhead. Also
from the fps you gave it sounds like v-sync is on and given the afore mentioned
slight delay might cause a large delay due to sync missis in the end.
Arne
Am 11.03.2012 um 19:13 schrieb Marco Fiocco:
> I'm working with OpenSceneGraph 3.0.1 (the latest stable) and Qt.
> I have noticed a strange frame rate drop switching from Qt 4.7 to 4.8. With
> 4.7.3, the frame rate was maximum 60fps on every computer. With 4.8 the frame
> is maximum 38-40fps on every computer. Definitely too much to accept.
> I cannot understand why! Is it a bug or what?
> Thanks for any help
> Marco
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