could we have, say, stat(2), that tells you how many frames actually happened between calls to _update60()? (stat(1) is quite unreliable for this)

undocumented: _get_frames_skipped()
only reliable inside _draw() though (_update() can get called multiple times)

> undocumented: _get_frames_skipped()

whoa, nice find!

ahem, except it doesn't work.

more info there:
https://www.lexaloffle.com/bbs/?tid=28092