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Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212.

References (2 earlier) <k45kg5$qpo$1@ger.gmane.org> <50665A23.1060300@tim.thechases.com> <mailman.1600.1348889168.27098.python-list@python.org> <50666b49$0$29981$c3e8da3$5496439d@news.astraweb.com> <k46fen$4g6$1@ger.gmane.org>
Date 2012-09-29 20:05 +1000
Subject Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212.
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1613.1348913142.27098.python-list@python.org> (permalink)

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On Sat, Sep 29, 2012 at 7:38 PM, Mark Lawrence <breamoreboy@yahoo.co.uk> wrote:
>
> My understanding is that Python 3.3 has regressed the performance of ''.
> Surely the Python devs can speed the performance back up and, just for us,
> use less memory at the same time?

Yes, but to do that we'd have to make Python more Australia-focused
instead of US-centric. As of Python 3.4, the empty string will be
lazily evaluated and be delimited by redback spiders instead of
quotes. That will give a 25% speed and 50% memory usage improvement,
but you'll need to be careful you don't get bitten.

ChrisA

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write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. iMath <redstone-cold@163.com> - 2012-09-28 17:31 -0700
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Tim Chase <python.list@tim.thechases.com> - 2012-09-28 20:35 -0500
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Paul Rubin <no.email@nospam.invalid> - 2012-09-28 18:42 -0700
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-29 02:58 +0100
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Tim Chase <python.list@tim.thechases.com> - 2012-09-28 21:17 -0500
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-28 21:25 -0600
    Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-29 03:30 +0000
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Tim Chase <python.list@tim.thechases.com> - 2012-09-28 22:50 -0500
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-29 10:38 +0100
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Chris Angelico <rosuav@gmail.com> - 2012-09-29 20:05 +1000
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-29 11:50 +0100
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-29 11:04 -0600
      Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Chris Angelico <rosuav@gmail.com> - 2012-09-30 09:26 +1000
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Tim Chase <python.list@tim.thechases.com> - 2012-09-28 22:42 -0500
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-09-29 00:25 -0400
  Re: write a regex matches 800-555-1212, 555-1212, and also (800) 555-1212. Fg Nu <fgnu32@yahoo.com> - 2012-09-28 21:25 -0700

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