281.py

#!/usr/bin/env python -tt
# -*- coding: utf-8 -*-

from __future__ import print_function, unicode_literals
import os, os.path
import sys
import re
from pprint import pprint, pformat


import timeit

x1 = range (1000000)
x2 = range (0, 2000000, 2)
assert len (x1) == len (x2), 'error'

from itertools import izip

class T:
    @staticmethod
    def with_zip ():
        for i, j in zip (x1, x2):
            k = i * j

    @staticmethod
    def with_izip ():
        for i, j in izip (x1, x2):
            k = i * j

    @staticmethod
    def without_zip_range ():
        for i in range (len (x1)):
            k = x1[i] * x2[i]

    @staticmethod
    def without_zip_xrange ():
        for i in xrange (len (x1)):
            k = x1[i] * x2[i]

for i in ('with_zip', 'with_izip', 'without_zip_range', 'without_zip_xrange'):
    print (i, timeit.timeit (getattr (T, i), number=100))

# results:
# % python ~/p/python/281.py
# with_zip 37.5300300121
# with_izip 14.6356389523
# without_zip_range 21.2632069588
# without_zip_xrange 17.0181829929