Time

from Time import now, sleep, time_function

now

Gets the current nanoseconds using the systems monotonic clock, which is generally the time elapsed since the machine was booted, but will vary behaviour by platform for states like sleep etc.

print(now())

276729993584072

sleep

Make a thread sleep for the duration in seconds

let tic = now()
sleep(.001)
let toc = now() - tic

print("slept for", toc, "nanoseconds")

slept for 1062234 nanoseconds

time_function

Pass in a nested fn a.k.a closure that takes no arguments and returns None as a parameter, e.g. to time a function named sleep1ms:

fn sleep1ms():
    sleep(.001)

fn measure():
    fn closure() -> None:
        sleep1ms()

    let nanos = time_function[closure]()
    print("sleeper took", nanos, "nanoseconds to run")

measure()

sleeper took 1060233 nanoseconds to run