Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeder.news-service.com!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.012
X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:80.91.229.12': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:lo.gmane.org': 0.09; 'subject:" ': 0.10; 'received:173.11': 0.16; 'subject:=': 0.16; 'resolution': 0.21; 'result.': 0.21; 'header:In-Reply-To:1': 0.22; 'windows': 0.26; 'van': 0.26; 'loop': 0.28; 'ran': 0.30; 'to:addr:python-list': 0.33; '...': 0.34; 'header:User-Agent:1': 0.34; 'richard': 0.34; 'corp.': 0.34; 'header:X-Complaints-To:1': 0.35; 'issue': 0.36; 'received:org': 0.38; 'subject:: ': 0.39; 'header:Mime-Version:1': 0.39; 'to:addr:python.org': 0.39; 'subject: (': 0.39; 'hit': 0.40; "it's": 0.40; 'minimum': 0.40; 'more': 0.60; 'copyright': 0.62; 'subject:+': 0.73
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Emile van Sebille <emile@fenx.com>
Subject: Re: relative speed of incremention syntaxes (or "i=i+1" VS "i+=1")
Date: Mon, 22 Aug 2011 10:22:25 -0700
References: <4e513ceb$0$23863$e4fe514c@news2.news.xs4all.nl> <1313947658.3424.3.camel@thegeorge> <mailman.285.1313955635.27778.python-list@python.org> <mailman.287.1313956392.27778.python-list@python.org> <4e51ad16$0$29975$c3e8da3$5496439d@news.astraweb.com> <CALMxxxkLE9G6_3yLh3rwRBAbqr1Zi3_-dLkD0yTQ8JJXZxCkmA@mail.gmail.com> <j2u0he$2d9$1@dough.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: 173-11-108-137-sfba.hfc.comcastbusiness.net
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20110812 Thunderbird/6.0
In-Reply-To: <j2u0he$2d9$1@dough.gmane.org>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.322.1314033759.27778.python-list@python.org>
Lines: 22
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1314033759 news.xs4all.nl 23982 [2001:888:2000:d::a6]:35558
X-Complaints-To: abuse@xs4all.nl
Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:12040

On 8/22/2011 9:35 AM Emile van Sebille said...
> On 8/22/2011 2:55 AM Richard D. Moores said...
>> Coincidence?
>>
>
> Naaa.. I just ran it twice -- once per ... _this_ is coincidence. :)
>
> Microsoft Windows XP [Version 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
>
> C:\Documents and Settings\Emile>python -m timeit -r 3 -s "n=0" "n=n+1"
> 10000000 loops, best of 3: 0.108 usec per loop
>
> C:\Documents and Settings\Emile>python -m timeit -r 3 -s "n=0" "n += 1"
> 10000000 loops, best of 3: 0.108 usec per loop

Actually, it's more likely I hit a minimum resolution issue -- I ran it 
twenty more times and never got a different result.

Emile