A script that measure how long execution of something took, good for Windows where there is no "time" command

timeit.py

#!/usr/bin/env python
import subprocess
import sys
import time

def main():
    start_time = time.time()
    subprocess.call(' '.join(sys.argv[1:]), shell=True)
    delta = time.time() - start_time
    hours = int(round(delta / 3600, 0))
    minutes = int(round((delta % 3600) / 60, 0))
    seconds = round((delta % 3600) % 60, 3)

    hours_str = "{0}h ".format(hours) if hours != 0 else ''
    minutes_str = "{0}m ".format(minutes) if (minutes != 0 or hours_str != '') else ''
    seconds_str = "{0}s".format(seconds)
    sys.stderr.write("Took: {0}{1}{2}\n".format(hours_str, minutes_str, seconds_str))

if __name__ == "__main__":
    main()