[Cython] How to improve the performance when doing string/unicode replace and search?

Yunfan Jiang jyf1987 at gmail.com
Wed Mar 30 08:41:22 CEST 2011

sorry for ask in the wrong groups, what i mean "not use it" is that, i have
download the
latest cython source and installed it

and i check that the change code is already there, but my bug can still

On Wed, Mar 30, 2011 at 1:02 PM, Stefan Behnel <stefan_ml at behnel.de> wrote:

> Yunfan Jiang, 30.03.2011 05:33:
>  hi, i used to ask some string process question here, and found  a bug, it
>> seems you guys fix the bug but not use it
> Not sure what you mean by "not use it".
>  and this time , my problem is about the performance,
>> i need to wrote  a filter which search sorts of keywords in the target
>> string , and stop if matched,
>> this act require unicode input/output  , so i wrote a trie like module to
>> done it, it works ,but i found its too slower than using regex module
>> so could you guys give some tips on string process performance?
> Note that the right place to ask usage related questions is the Cython
> users mailing list, not the core developers mailing list. I set a follow-up
> to point you there.
> Generally speaking, a trie isn't necessarily fast, and it's certainly not
> the best algorithmic approach for keyword search. You should read up on
> Aho-Corasick and friends. I also wrote a simple Cython module that
> implements a keyword search algorithm ("acora", it's on PyPI), but it's
> unusable for large sets of keywords due to state explosion. It's pretty fast
> for smaller sets though.
> Stefan
> _______________________________________________
> cython-devel mailing list
> cython-devel at python.org
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