Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!usenet-fr.net!nerim.net!novso.com!news.skynet.be!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.032 X-Spam-Evidence: '*H*': 0.94; '*S*': 0.00; 'binary': 0.05; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'wrote:': 0.17; 'module': 0.19; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.28; 'from:addr:yahoo.co.uk': 0.32; 'to:addr:python-list': 0.33; 'operations': 0.33; 'faster': 0.35; 'received:org': 0.36; 'subject:" ': 0.36; 'bad': 0.37; 'why': 0.37; 'subject:: ': 0.38; 'mark': 0.38; 'to:addr:python.org': 0.39; 'subject:-': 0.40; 'header:Received:5': 0.40; 'power': 0.74; 'subject:Floor': 0.84; 'yourself?': 0.84; 'received:2': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: Bitshifts and "And" vs Floor-division and Modular Date: Fri, 07 Sep 2012 01:30:41 +0100 References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: host-2-98-196-42.as13285.net User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:15.0) Gecko/20120824 Thunderbird/15.0 In-Reply-To: X-Antivirus: avast! (VPS 120906-0, 06/09/2012), Outbound message X-Antivirus-Status: Clean X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 12 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1346977804 news.xs4all.nl 6866 [2001:888:2000:d::a6]:35231 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:28652 On 07/09/2012 01:01, jimbo1qaz wrote: > Is it faster to use bitshifts or floor division? And which is better, & or %? > All divisors and mods are power of 2, so are binary operations faster? And are they considered bad style? > Why don't you use the timeit module and find out for yourself? -- Cheers. Mark Lawrence.