On 18/06/2013 20:21, Roy Smith wrote:
In article <mailman.3549.1371576854.3114.python-l...@python.org>,
Mark Lawrence <breamore...@yahoo.co.uk> wrote:
Out of curiousity have the tried the new regex module from pypi rather
than the stdlib version? A heck of a lot of work has gone into it see
http://bugs.python.org/issue2636
I just installed that and gave it a shot. It's *slower* (and, much
higher variation from run to run). I'm too exhausted fighting with
OpenOffice to get this into some sane spreadsheet format, so here's
the raw timings:
Built-in re module:
0:01.32
0:01.33
0:01.32
0:01.33
0:01.35
0:01.32
0:01.35
0:01.36
0:01.33
0:01.32
regex with flags=V0:
0:01.66
0:01.53
0:01.51
0:01.47
0:01.81
0:01.58
0:01.78
0:01.57
0:01.64
0:01.60
regex with flags=V1:
0:01.53
0:01.57
0:01.65
0:01.61
0:01.83
0:01.82
0:01.59
0:01.60
0:01.55
0:01.82
I reckon that about 1/3 of that time is spent in
PyArg_ParseTupleAndKeywords, just getting the arguments!
There's a higher initial overhead in using regex than string methods,
so working just a line at time will take longer.
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