Slow XQueryPointer?

[Lauri Kasanen]

Hi list

Tracing why there's the occasional delay in Irrlicht apps showed the culprit as XQueryPointer.

It's called once per frame, but occasionally it takes much longer than the average 80us - up to 30ms. This is a huge delay and easily noticable as a skip/jitter.

Trying various alternatives, like using the mouse position from the last Motion/Click event proved jerky/jittery and seemed to lag the mouse by some frames.


Any suggestions on making the call faster? Would it be possible to use it with a timeout, say, if it takes over 1ms, abort?

-- 
- Lauri