Szathmáry László honlapja @ DEIK

Unix and POSIX measure time as the number of seconds that have passed since Thursday 1 January 1970 00:00:00, a point in time known as the Unix epoch.

import std/times

for i in 1..3:
echo epochTime()

echo ""
echo epochTime().int

Sample output:

1779022306.1149607
1779022306.1149895
1779022306.1149921

1779022306

It is a float because sub-second resolution is likely to be supported (depending on the hardware/OS).

As can be seen, even in a tight loop the sub-second resolution changes.

If you want just the seconds, then convert it to an int.

Measure the execution time

import std/os
import std/strformat # &"Hello {name}!"
import std/times

proc slow() =
sleep(2000) # 2 sec.

let start = epochTime()
slow()
let stop = epochTime() # `end` is a keyword

echo &"Elapsed time: {stop-start} sec." # Elapsed time: 2.000084400177002 sec.

epoch time

Measure the execution time