How to call a timer function every 50ms exactly?

Solar2D General Questions/Discussion
#1

When I call timer.performWithDelay() like this: (with FPS set to 60)

timer.performWithDelay(50, onTimer, 0)

I found onTimer() is called every 66ms approximately. I figure it is because when FPS is 60, each frame is called every

1000/60 = 16.67 ms

Hence, when I set the timer to 50ms, there must be 4 frames passed in order to pass 50ms, so it is about 

16.67 * 4 = 66.68 ms

Is there any way to make exact 50ms case happen? (I know the delay might fluctuate a bit, but right now I only know the delay has to be something close to the multiply of 1000/60).

#2

You’re right about the fluctuation and no, you can’t guarantee that the timer will be called exactly when you specify. I think the docs says that the time period is “not before”, and that pretty much applies to any timer in any system.

#3

You’re right about the fluctuation and no, you can’t guarantee that the timer will be called exactly when you specify. I think the docs says that the time period is “not before”, and that pretty much applies to any timer in any system.