str.isdigit() と re.match() のベンチマーク

bench3.py

# -*- coding: utf-8 -*-

import sys, re
from benchmarker import Benchmarker

try:
    xrange
except:
    xrange = range


N = 100000
for bm in Benchmarker(width=30, cycle=10, extra=1):

    string = "20140914"

    with bm.empty():
        for _ in xrange(N):
            pass

    with bm("re.search()"):
        for _ in xrange(N):
            re.search(r'^\d+$', string)

    with bm("re.compile().search()"):
        rexp = re.compile(r'^\d+$')
        for _ in xrange(N):
            rexp.search(string)

    with bm("str.isdigit()"):
        for _ in xrange(N):
            string.isdigit()



### Result example on CPython 3.4.1:
r"""
## Ranking                         real
str.isdigit()                    0.0204 (100.0%) *************************
re.compile().search()            0.1016 ( 20.1%) *****
re.search()                      0.2982 (  6.9%) **

## Ratio Matrix                    real    [01]    [02]    [03]
[01] str.isdigit()               0.0204  100.0%  497.2% 1459.6%
[02] re.compile().search()       0.1016   20.1%  100.0%  293.5%
[03] re.search()                 0.2982    6.9%   34.1%  100.0%
"""