Paul McGuire wrote:
> Comparitive timing of pyparsing vs. re comes in at about 2ms for pyparsing,
> vs. 0.13 for re's, so about 15x faster for re's. If psyco is used (and we
> skip the first call, which incurs all the compiling overhead), the speed
> difference drops to about 7-10x. I did try compiling the re, but this
> didn't appear to make any difference - probably user error.
That is because of how the methods in the sre module are implemented...
Compiling a regex really just saves you a dictionary lookup.
def findall(pattern, string, flags=0):
"""snip"""
return _compile(pattern, flags).findall(string)
def compile(pattern, flags=0):
"""snip"""
return _compile(pattern, flags)
def _compile(*key):
# internal: compile pattern
cachekey = (type(key[0]),) + key
p = _cache.get(cachekey)
if p is not None:
return p
#snip
--
- Justin
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