timing_range.py

import timeit

def f_range(n):
    for i in range(n):
        pass
    
def f_xrange(n):
    for i in xrange(n):
        pass
    
def f_while(n):
    i = 0
    while i < 100:
        i += 1
        
print(timeit.timeit("f_range(100)",  "from __main__ import f_range"))   # 7.39035423582
print(timeit.timeit("f_xrange(100)", "from __main__ import f_xrange"))  # 5.14161613217
print(timeit.timeit("f_while(100)",  "from __main__ import f_while"))   # 13.3456207994