Variable dt causes game to run twice as fast (DEF-3146) (SOLVED)

[dapetcu21]

@britzl Hi! Sorry for insisting, but did this get an issue number? It’s pretty serious and reading the forum I see other people are having seemingly similar timing issues:

https://forum.defold.com/t/defold-timer-the-native-timer-extension/6581/74

Frames per second - different when using dt versus system clock

Hello! I was having some genuine performance issues with my game (which have since gone away with some refactoring, and by realising that streaming in OBS using window capture and Windows Aero enabled is a baaaaaad idea), which highlighted something odd with how I am tracking frames per second. I have written two functions for tracking fps - one using the dt reported by the engine, and one using differences in os.clock(). The dt function reports 53 fps as the maximum framerate. The os.clock() …

Additionally, a colleague noticed that there are issues even when variable dt is turned off (animations with go.animate() go too slowly, while the dt we get in update goes at the right rate). I’ve yet to confirm this, though (I’ll only get to Win PC tomorrow). Might have been just frame skips.