2008-07-26, 09:14 PM
I don't know for sure, but in my experiences with SDL (which on Windows uses DirectX 7) I found that window-mode applications had a lower average frame rate than Full-screen mode applications (even when both are hardware). So it may be due to the fact that it may have to interact with Windows more than if it were in full-screen mode? I'm not sure, I just learned this from experiments.

