Performance - Iterate A File & Regular Expressions

ex_re.py

import re
import time

s = time.time()
c = re.compile("Slide.*-.*")
for i in range(3):
  n = 0
  fp = open("jython-presentation.py", "r")
  try:
    for line in fp:
      if c.search(line):
        n += 1
  finally:
    fp.close()
  print "found %02d occurences" % (n)
e = time.time()
print e - s

ex_re.py Something to note, files are not automatically closed in Jython as they are in CPython.

Python

$ python ex_re.py 
found 14 occurences
found 14 occurences
found 14 occurences
0.0106308460236

Jython

$ jython ex_re.py 
found 14 occurences
found 14 occurences
found 14 occurences
0.29399991035461426