# coding: utf-8

import time

def fun():
    t = time.time()
    msg = ''
    for i in xrange(100000):
        a = 6555*84567/1230/456
        a = 6555*84567/1230/456
        a = 6555*84567/1230/456
        a = 6555*84567/1230/456
        a = 6555*84567/1230/456
        a = 6555*84567/1230/456
        t2 = time.time()
        d = (t2-t)*1000
        t = t2
        if d>1: print '%d' % d
fun()

15
15
15
16
16
14

[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
1
5
92%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
1
3
2
91%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
13
2
17
19
13
5
18
5
8
9
8
2
7
8
2
2
2
2
2
2
2
2
69%
[crchemist@localhost tmp]$ man time
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
97%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
95%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
15
12
5
11
8
8
5
12
2
2
2
2
2
2
2
2
2
2
2
2
77%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
95%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
99%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
94%
[crchemist@localhost tmp]$ /usr/bin/time -f "%P" python t.py 
14
13
92%