Re: Curious to see alternate approach on a search/replace via regex

References	(4 earlier) <mailman.1460.1360278819.2939.python-list@python.org> <51143feb$0$29974$c3e8da3$5496439d@news.astraweb.com> <CALwzidmiR=ZaSF=woeHgOOmVtCrcngnFm_bMOizM+Lo6OOALBA@mail.gmail.com> <CALwzid=fkG9fFELE_xRmJwM2-KvhkBLkSw6_OBuUpZ+wshMbVA@mail.gmail.com> <20130207215755.3c4a5c464357313496320cc3@lavabit.com>
From	Ian Kelly <ian.g.kelly@gmail.com>
Date	2013-02-08 01:21 -0700
Subject	Re: Curious to see alternate approach on a search/replace via regex
Newsgroups	comp.lang.python
Message-ID	<mailman.1492.1360311744.2939.python-list@python.org> (permalink)

Show all headers | View raw

On Thu, Feb 7, 2013 at 10:57 PM, rh <richard_hubbe11@lavabit.com> wrote:
> On Thu, 7 Feb 2013 18:08:00 -0700
> Ian Kelly <ian.g.kelly@gmail.com> wrote:
>
>> Which is approximately 30 times slower, so clearly the regular
>> expression *is* being cached.  I think what we're seeing here is that
>> the time needed to look up the compiled regular expression in the
>> cache is a significant fraction of the time needed to actually execute
>> it.
>
> By "actually execute" you mean to apply the compiled expression
> to the search or sub? Or do you mean the time needed to compile
> the pattern into a regex obj?

The former.  Both are dwarfed by the time needed to compile the pattern.

Thread

Re: Curious to see alternate approach on a search/replace via regex Demian Brecht <demianbrecht@gmail.com> - 2013-02-06 13:55 -0800
  Re: Curious to see alternate approach on a search/replace via regex Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-07 03:04 +0000
    Re: Curious to see alternate approach on a search/replace via regex rh <richard_hubbe11@lavabit.com> - 2013-02-06 19:31 -0800
      Re: Curious to see alternate approach on a search/replace via regex Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-08 09:45 +1100
        Re: Curious to see alternate approach on a search/replace via regex rh <richard_hubbe11@lavabit.com> - 2013-02-07 15:13 -0800
          Re: Curious to see alternate approach on a search/replace via regex Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-08 10:59 +1100
            Re: Curious to see alternate approach on a search/replace via regex Ian Kelly <ian.g.kelly@gmail.com> - 2013-02-07 17:55 -0700
              Re: Curious to see alternate approach on a search/replace via regex Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-08 14:02 +1100
                Re: Curious to see alternate approach on a search/replace via regex rh <richard_hubbe11@lavabit.com> - 2013-02-07 21:35 -0800
            Re: Curious to see alternate approach on a search/replace via regex Ian Kelly <ian.g.kelly@gmail.com> - 2013-02-07 18:08 -0700
            Re: Curious to see alternate approach on a search/replace via regex rh <richard_hubbe11@lavabit.com> - 2013-02-07 21:57 -0800
            Re: Curious to see alternate approach on a search/replace via regex Ian Kelly <ian.g.kelly@gmail.com> - 2013-02-08 01:21 -0700
              Re: Curious to see alternate approach on a search/replace via regex Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-08 22:43 +1100
                Re: Curious to see alternate approach on a search/replace via regex Ian Kelly <ian.g.kelly@gmail.com> - 2013-02-08 09:26 -0700
            Re: Curious to see alternate approach on a search/replace via regex Serhiy Storchaka <storchaka@gmail.com> - 2013-02-15 22:58 +0200
            Re: Curious to see alternate approach on a search/replace via regex rh <richard_hubbe11@lavabit.com> - 2013-02-26 11:20 -0800
        Re: Curious to see alternate approach on a search/replace via regex Dave Angel <davea@davea.name> - 2013-02-08 01:27 -0500
    Re: Curious to see alternate approach on a search/replace via regex jmfauth <wxjmfauth@gmail.com> - 2013-02-07 03:08 -0800
      Re: Curious to see alternate approach on a search/replace via regex Chris Angelico <rosuav@gmail.com> - 2013-02-07 23:44 +1100

csiph-web