It seems there is some performance issue since windows vista. I run kicad on ubuntu via VirtualBox. By this way it's 10 times faster than directly on Windows 7. I did not found any workaround for the moment.
>From my investigation it look like a poor OpenGL implementation since windows >Vista. Using a PC with or without graphique card has no performance impact. So >my conclusion is that there is no OpenGL hardware support since windows Vista. >Maybe Microsoft wants favor directX.
