[Ironpython-users] running asciidoc

Pawel Jasinski pawel.jasinski at gmail.com
Fri Apr 18 00:32:44 CEST 2014

I think it is simple .net regex which is slower.
I did the following:
1. Proved that asciidoc run under python (cygwin) evaluates the same
regular expression as under ipy - there are no bugs which make ipy evaluate
more REs
2. Captured the evaluated regular expressions in a form suitable for .net
and python
3. Write trivial program in c# to evaluate captured REs. (6 seconds)
4. Write trivial program in python to evaluate captured REs (0.4s for
python3.2 and 0.65s for python 2.7.5)
I also got rid off ipy/c# quirks (extra named groups), to get functional
equivalent and no conversion overhead - no change
Number of captured REs is 46253.
For this particular sample, cpython implementation if regular expression
appears to be 12 times faster than .net implementation


On Wed, Apr 16, 2014 at 5:20 PM, Pawel Jasinski <pawel.jasinski at gmail.com>wrote:

> hi,
> I have made an exercise of running asciidoc under ironpython
> It turned out to be a performance disappointment.
> Converting trivial document takes 30 seconds where cpython is done
> under a second.
> Can it be that asciidoc, which makes heavy use of regular expression,
> exposes weak part of ironpython?
> Has anybody similar experience with applications using  heavily re?
> Am I doing something wrong?
> --pawel
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