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Groups > comp.lang.python > #51409

Re: collections.Counter surprisingly slow

From Roy Smith <roy@panix.com>
Newsgroups comp.lang.python
Subject Re: collections.Counter surprisingly slow
Date 2013-07-28 17:57 -0400
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <roy-4B9DE0.17571228072013@news.panix.com> (permalink)
References <roy-8C60F5.15590428072013@news.panix.com> <51f5843f$0$29971$c3e8da3$5496439d@news.astraweb.com>

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In article <51f5843f$0$29971$c3e8da3$5496439d@news.astraweb.com>,
 Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:

> > Why is count() [i.e. collections.Counter] so slow?
> 
> It's within a factor of 2 of test, and 3 of exception or default (give or 
> take). I don't think that's surprisingly slow.

It is for a module which describes itself as "High-performance container 
datatypes" :-)

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collections.Counter surprisingly slow Roy Smith <roy@panix.com> - 2013-07-28 15:59 -0400
  Re: collections.Counter surprisingly slow Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-28 20:51 +0000
    Re: collections.Counter surprisingly slow Roy Smith <roy@panix.com> - 2013-07-28 17:57 -0400
    Re: collections.Counter surprisingly slow Stefan Behnel <stefan_ml@behnel.de> - 2013-07-29 13:46 +0200
    Re: collections.Counter surprisingly slow Joshua Landau <joshua@landau.ws> - 2013-07-29 13:07 +0100
  Re: collections.Counter surprisingly slow Serhiy Storchaka <storchaka@gmail.com> - 2013-07-29 09:25 +0300
  Re: collections.Counter surprisingly slow Joshua Landau <joshua@landau.ws> - 2013-07-29 12:49 +0100
  Re: collections.Counter surprisingly slow Ian Kelly <ian.g.kelly@gmail.com> - 2013-07-29 11:19 -0600
  Re: collections.Counter surprisingly slow Serhiy Storchaka <storchaka@gmail.com> - 2013-07-29 22:37 +0300
  Re: collections.Counter surprisingly slow Stefan Behnel <stefan_ml@behnel.de> - 2013-07-30 08:39 +0200
  Re: collections.Counter surprisingly slow Stefan Behnel <stefan_ml@behnel.de> - 2013-07-30 08:51 +0200
  Re: collections.Counter surprisingly slow Serhiy Storchaka <storchaka@gmail.com> - 2013-07-30 16:04 +0300

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