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Re: optomizations

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On Tue, Apr 23, 2013 at 11:53 AM, Roy Smith <roy@panix.com> wrote:
> In article <mailman.944.1366680414.3114.python-list@python.org>,
>  Rodrick Brown <rodrick.brown@gmail.com> wrote:
>
>> I would like some feedback on possible solutions to make this script run
>> faster.
>
> If I had to guess, I would think this stuff:
>
>>                     line = line.replace('mediacdn.xxx.com', 'media.xxx.com')
>>                     line = line.replace('staticcdn.xxx.co.uk', '
>> static.xxx.co.uk')
>>                     line = line.replace('cdn.xxx', 'www.xxx')
>>                     line = line.replace('cdn.xxx', 'www.xxx')
>>                     line = line.replace('cdn.xx', 'www.xx')
>>                     siteurl = line.split()[6].split('/')[2]
>>                     line = re.sub(r'\bhttps?://%s\b' % siteurl, "", line, 1)
>
> You make 6 copies of every line.  That's slow.

One of those is a regular expression substitution, which is also
likely to be a hot-spot. But definitely profile.

ChrisA

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optomizations Rodrick Brown <rodrick.brown@gmail.com> - 2013-04-22 21:19 -0400
  Re: optomizations Roy Smith <roy@panix.com> - 2013-04-22 21:53 -0400
    Re: optomizations Dan Stromberg <drsalists@gmail.com> - 2013-04-22 20:15 -0700
    Re: optomizations Rodrick Brown <rodrick.brown@gmail.com> - 2013-04-23 00:20 -0400
      Re: optomizations Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 04:38 +0000
    Re: optomizations Chris Angelico <rosuav@gmail.com> - 2013-04-23 12:03 +1000
  Re: optomizations Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 04:00 +0000
    Re: optomizations Chris Angelico <rosuav@gmail.com> - 2013-04-23 14:08 +1000
    percent faster than format()? (was: Re: optomizations) Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-04-23 09:46 +0200
      Re: percent faster than format()? (was: Re: optomizations) Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2013-04-23 10:26 +0200
        Re: percent faster than format()? Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-04-23 16:57 +0200
          Re: percent faster than format()? Lele Gaifax <lele@metapensiero.it> - 2013-04-23 17:44 +0200
      Re: percent faster than format()? (was: Re: optomizations) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 14:36 +0000
        Re: percent faster than format()? (was: Re: optomizations) Chris Angelico <rosuav@gmail.com> - 2013-04-24 00:52 +1000

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