Update: Now with threading. Mouse moves much more smoothly. However, I get some errors in terminal about a pool not released which I don't understand. It says it may be leaking memory but I don't see that - I let it run and the memory consumption didn't go up. And does anybody know how to stop a threaded program? Control+c doesn't work reliably, I sometimes have to kill it by closing the window. Use threaded version at your own risk.