I have a windowless timer (no WM_TIMER) which fires a callback function only once when a given time period is elapsed. It is implemented as a SetTimer()/KillTimer(). Time periods are small enough: 100-300 milliseconds.

Is that cheap enough (I mean performance) to call SetTimer()/KillTimer() pair for every such short time interval?

What if I have 100 such timers which periodically call SetTimer()/KillTimer()? How much Window timer objects may exist simultaneously in the system?

That is the question: Use a bunch of such timer objects and rely on good Windows implementation of timers, or create one Windows timer object that ticks every, say, 30 milliseconds, and subscribe all custom 100-300 milliseconds one-time timers to it.

Thanks

c++ windows winapi
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