Game stutter - when does it become apparent?

[aubergine]

If there's too much JS processing on a game tick, the game will stutter.

How much time should JS processing be limited to on a game tick (across all players) to avoid end-users noticing stutter?

Also, what sort of JS processing tasks seem to take the most time?

[NoQ]

Under ~40ms is usually fine on my machine i think. Not sure how much sound drivers affect that.

[aubergine]

ISTR you did some profiling of your functions in nullbot - what sort of times were you generally getting for, say, processing an event or a function triggered by setTimer()?

Reason: I'm making a library that will spread code execution over game ticks and I'm trying to determine initial thresholds, etc., before getting in to the fine tuning stage.

I can see straight away that my current allowance of 150ms per game tick (for 2 player games, dropping down to 40ms in 10 player games) is somewhat exuberant!