TrueTimeClient.sharedInstance.referenceTime?.now() returns date with millisecond precision

[Visput]

I noticed that TrueTimeClient.sharedInstance.referenceTime?.now() returns date with millisecond precision while system call Date() returns date with microsecond precision.

This behavior can be verified in following way:

print(TrueTimeClient.sharedInstance.referenceTime!.now().timeIntervalSince1970) // Prints 1492622263.091

print(Date().timeIntervalSince1970) // Prints 1492622263.12779

Such loose in precision can be harmful for tasks which depend on timestamp accuracy.

[msanders]

@Visput: Good point. NTP doesn't support this level of precision but we can update the data types used internally to at least maintain what is returned by the initial system calls.