[jvz]

> IIRC this project Gets to 120 when you drag your mouse

What causes that kind of thing? I've noticed stuff like that while playing video in mpv sometimes (despite my Mac being easily fast enough to play the video) and it just baffles me.

[Doxin]

Moving the mouse has a tendency to send various events to windows. Sometimes just the mousemotion event is enough to trigger the program to redraw. I'm not sure how cursors are implemented on osX but it might just be marking the bit under the cursor dirty, triggering a redraw.