Timing different methods for string reversion in Python

gistfile1.py

import timeit


string = "Hello, World!"


def reverse(string):
    result = ""
    for i in xrange(len(string), 0, -1):
        result = result+string[i-1]
    return result


def reverse_join(string):
    return "".join([string[i-1] for i in xrange(len(string), 0, -1)])


def join_and_reversed(string):
    return "".join(reversed(string))


def slice_reverse(string):
    return string[::-1]


print 'Reverse function'
print timeit.timeit('reverse(string)', setup='from __main__ import reverse, string', number=10**6)
print '-'*80

print 'Using join'
print timeit.timeit('reverse_join(string)', setup='from __main__ import reverse_join, string', number=10**6)
print '-'*80

print 'Using join and reversed'
print timeit.timeit('join_and_reversed(string)', setup='from __main__ import join_and_reversed, string', number=10**6)
print '-'*80

print 'Using slice'
print timeit.timeit('slice_reverse(string)', setup='from __main__ import slice_reverse, string', number=10**6)
print '-'*80