Comment 22 for bug 772177

I am seeing this even after setting the window popup delay to zero. I think the configurable delay is actually a red herring for the real bug, a lack of responsiveness when hitting alt-tab. On my machine the lag between the keystroke and the window appearing is about 400-500ms. Other compiz-related keystrokes, such as the expose view, something starts to happen /instantly/ once the key is pressed.

This bug really hurts the overall feeling of the OS's responsiveness.