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Date: Fri, 03 Jun 2011 03:41:47 +0100
From: MRAB <python@mrabarnett.plus.com>
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Subject: Re: how to avoid leading white spaces
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On 03/06/2011 02:57, Roy Smith wrote:
> In article<94ph22FrhvU5@mid.individual.net>,
>   Neil Cerutti<neilc@norwich.edu>  wrote:
>
>> On 2011-06-01, rurpy@yahoo.com<rurpy@yahoo.com>  wrote:
>>> For some odd reason (perhaps because they are used a lot in
>>> Perl), this groups seems to have a great aversion to regular
>>> expressions. Too bad because this is a typical problem where
>>> their use is the best solution.
>>
>> Python's str methods, when they're sufficent, are usually more
>> efficient.
>
> I was all set to say, "prove it!" when I decided to try an experiment.
> Much to my surprise, for at least one common case, this is indeed
> correct.
>
[snip]

I've tested it on my PC for Python 2.7 (bytestring) and Python 3.1
(Unicode) and included the "regex" module on PyPI:

Python 2.7:
0.949936333562
4.31320052965
1.14035334748

Python 3.1:
1.27268308633
4.2509511537
1.16866839819