How can I get the current system time in milliseconds or nanosec?

问题

Unix.time() returns seconds.

How can I get the time in ms or ns?

Thanks

回答1:

Try Unix.gettimeofday

# Unix.time ();;
- : float = 1447865942.
# Unix.gettimeofday();;
- : float = 1447865947.56802297

回答2:

Core has very robust time related functions, and since 112.06.00 there is a Time_ns module.

utop # Time_ns.now();;
- : Time_ns.t = 2015-11-18 14:49:08.580109-05:00

来源：https://stackoverflow.com/questions/33785791/how-can-i-get-the-current-system-time-in-milliseconds-or-nanosec