Hi,

NSDate's timeIntervalSinceReferenceDate returns a double value, that has changing decimal places up to 10e-23, but we all know that is not possible, because that would be even more than attoseconds precision. And the docs just speak of "sub-milliseconds" precision.

So, just how accurate is it?

Can it be used as replacement for counting nanoseconds/per instruction as with UpTime() ?

André
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