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  1. import timeit
  2. import __main__
  3. import random
  4. import string
  5. import re
  6.  
  7. N = 10 #Number of executions
  8. L = 1000000 #Length of string
  9. sym_rel_pos = 2
  10.  
  11. def test_f_re():
  12.     pat = ''.join(random.sample(string.ascii_letters,3)) #prevent re caching
  13.     s = '0'*(L - sym_rel_pos) + pat + '0'*sym_rel_pos
  14.     return re.sub(r'(.*)'+pat,r'\1XXX',s)
  15.  
  16. compiled = re.compile(r'(.*)'+'jjj')
  17. def test_f_re_with_caching():
  18.     pat = ''.join(random.sample(string.ascii_letters,3)) #left here to produce comparable results with other functions
  19.     s = '0'*(L - sym_rel_pos) + 'jjj' + '0'*sym_rel_pos
  20.     return compiled.sub(r'\1XXX',s)
  21.  
  22. def test_f_replace():
  23.     pat = ''.join(random.sample(string.ascii_letters,3)) 
  24.     s = '0'*(L - sym_rel_pos) + pat + '0'*sym_rel_pos
  25.     return s[::-1].replace(pat[::-1], "XXX"[::-1], 1)[::-1]
  26.  
  27. names = dir(__main__)
  28. for name in names:
  29.     attr = getattr(__main__,name)
  30.     if hasattr(attr,'__call__'):
  31.         if name.startswith('test_f_'):
  32.             init_name = name + '_init'
  33.             if hasattr(__main__, init_name):
  34.                 init = getattr(__main__,init_name)
  35.             else:
  36.                 init = 'from __main__ import {name}'.format(name=name, L=L)
  37.             t = timeit.Timer(stmt='{name}()'.format(name=name),
  38.                              setup=init)
  39.  
  40.             time = t.timeit(N)
  41.             print('{name}: {time}'.format(name=name,time=time))
Success #stdin #stdout 0.24s 5600KB
comments (?)
stdin 
Standard input is empty
stdout 
test_f_re: 0.0586512088776
test_f_re_with_caching: 0.0592479705811
test_f_replace: 0.0910179615021
https://ideone.com/xdQKh
language:
Python (cpython 2.7.16)
created:
12 years ago
visibility:
secret

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