Something I built for myself for doing some tests, not sure if this is interesting for a wider public.
Adds a configuration setting that limits the frames per second Krita heads for:
On OS X, at least 70% to 80% of the main thread is blocked inside OpenGL calls, Krita's own but QT GL compositor code as wel and there's nothing we can do about it (using non-GL output is even worse as it uses CPU based QRasterPainter)l. During that time, events like stylus tablet events are delayed (and dropped by the OS it seems to me). Reducing the fps can improve this situation by giving more time in the main thread to event handling. Obviously this hurts visual feedback.