Sleeping less than a second in OCaml

问题

The Unix.sleep function can suspend the program for whole seconds, but how can you suspend it for less than a second?

回答1:

The classical Unix solution for this is to use select() with no file descriptors:

let minisleep (sec: float) =
    ignore (Unix.select [] [] [] sec)

回答2:

The Thread.delay function pauses the thread for the given number of seconds, but it takes a float, allowing you to pause the thread for less than a second.

回答3:

from Unix module

val sleepf : float -> unit

Stop execution for the given number of seconds. Like sleep, but fractions of seconds are supported.

来源：https://stackoverflow.com/questions/10789601/sleeping-less-than-a-second-in-ocaml