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NSThread sleepUntilDate w/ dateWithTimeIntervalSinceNow and intervals < 1sec



Hello !

I have a background thread that needs to loop every 25ms.
After each loop, I calculate the time spent inside the loop, then call :

[NSThread sleepUntilDate: [NSDate dateWithTimeIntervalSinceNow: ]];

with a value between ]0;25ms]. But I'm getting strange offsets in what
should be a continuous heartbeat.

The docs talk about :
+ (id)dateWithTimeIntervalSinceNow:(NSTimeInterval)seconds

NSTimeInterval being a double, I assumed I could pass miliseconds,
or even microseconds. Does it actually round the parameter to the nearest
second ?


If this is the case, which is the best way to sleep an NSThread less than 1 sec
without rewriting the code to use some other kind of threading mechanism ?
(I really like the one-line call to launch it and manage it !)


thanks

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