time

import "time";

let t0 = time.mono();     // monotonic clock; a `duration` (int64 ns)
time.sleep(20000000);     // sleep for a duration (ns)
let elapsed = time.mono() - t0;   // duration arithmetic
let deadline = time.mono() + 5000000;  // timeout math for net calls

let wall = time.wall();   // unix epoch time in nanoseconds