Test startup times for python2.7 vs python3.3

startup_times.py

#!/usr/bin/python2.7
"""
Outputs on my PC:

"python2.7 startup_times.py nop" min run 0.019732 seconds
"python3.3 startup_times.py nop" min run 0.026251 seconds

"""
import subprocess
import time
import sys

if len(sys.argv) > 1:
    exit()

def test(line):
    res = []
    for i in range(20):
        start = time.time()
        subprocess.check_call(line, shell=True)
        end = time.time()
        res.append(end - start)
    #print(res)
    print('"%s" min run %f seconds' % (line, min(res)))


test('python2.7 startup_times.py nop')
test('python3.3 startup_times.py nop')