It there anybody can explain me why the presence of mouse cursor in OpenGL windows break speed.
For example in XBench or in GioFX OpenMark.
When I try full featured hardware OpenGL the presence of cursor makes me delays up to seconds for each refresh.
What is the influence?

because quartz composer have to render in-frame scene first than make texture from it than compose new scene with cursor dropping shadow on textured plane ) than show it to you
otherwise (without cursor) it probably run pure HW render in window
I think so at least
try to profile it