[Python-Dev] New regex module for 3.2? (original) (raw)

MRAB python at mrabarnett.plus.com
Fri Jul 9 19:28:08 CEST 2010

anatoly techtonik wrote:

On Thu, Jul 8, 2010 at 10:52 PM, MRAB <python at mrabarnett.plus.com> wrote:

Hi all,

I re-implemented the re module, adding new features and speed improvements. It's available at: http://pypi.python.org/pypi/regex under the name "regex" so that it can be tried alongside "re". I'd be interested in any comments or feedback. How does it compare with "re" in terms of speed on real-world data? The benchmarks suggest it should be faster, or at worst comparable. And where are the benchmarks? In particular it would be interesting to see it compared both to re from stdlib and re2 from http://code.google.com/p/re2/ The benchmarks bm_regex_effbot.py and bm_regex_v8.py both perform multiple runs of the tests multiple times, giving just the total times for each set. Here are the averages:

Python26 BENCHMARK re regex ratio bm_regex_effbot 0.135secs 0.083secs 1.63 bm_regex_v8 0.153secs 0.085secs 1.80

Python31 BENCHMARK re regex ratio bm_regex_effbot 0.138secs 0.083secs 1.66 bm_regex_v8 0.170secs 0.091secs 1.87

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