>>> def bench7():
...   foo = 0
...   a = time()
...   for i in repeat(None):
...     foo += 1
...     if foo == 100000000:
...       break
...   b = time()
...   print a, b, b-a
...
>>> def bench8():
...   foo = 0
...   a = time()
...   while True:
...     foo += 1
...     if foo == 100000000:
...       break
...   b = time()
...   print a, b, b-a
...
>>> bench7()
1326592924.41 1326592935.42 11.0051281452
>>> bench7()
1326592936.36 1326592947.48 11.1183578968
>>> bench8()
1326592951.47 1326592965.03 13.5640599728
>>> bench8()
1326592966.07 1326592979.6 13.5341670513