Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!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 0.011 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'subject:module': 0.09; 'runs': 0.10; 'python': 0.11; '2.7': 0.14; 'random': 0.14; 'windows': 0.15; '(1,': 0.16; 'subject:random': 0.16; 'vmware': 0.16; 'win7': 0.16; 'bit': 0.19; 'import': 0.22; 'print': 0.22; 'this?': 0.23; 'header:User-Agent:1': 0.23; 'received:65.55.116': 0.24; 'subject:Code': 0.24; 'code:': 0.26; 'code': 0.31; 'received:10.0.0': 0.31; 'clock': 0.31; 'running': 0.33; 'subject:the': 0.34; 'subject:with': 0.35; 'version': 0.36; 'received:10.0': 0.36; 'seconds': 0.37; 'received:10': 0.37; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'times': 0.62; 'faster...': 0.84; 'seconds!': 0.84 X-TMN: [FMHsObKeyBfNBfNImm2DLwAcThqweB87] X-Originating-Email: [pascalbit@hotmail.com] Date: Fri, 8 Nov 2013 18:48:04 +0100 From: Pascal Bit User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 MIME-Version: 1.0 To: python-list@python.org Subject: Code with random module faster on the vm than the vm host... Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 08 Nov 2013 17:48:10.0647 (UTC) FILETIME=[B0A4E270:01CEDCAA] X-Mailman-Approved-At: Fri, 08 Nov 2013 21:21:23 +0100 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: 27 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1383942084 news.xs4all.nl 15935 [2001:888:2000:d::a6]:50408 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:58849 Here's the code: from random import random from time import clock s = clock() for i in (1, 2, 3, 6, 8): M = 0 N = 10**i for n in xrange(N): r = random() if 0.5 < r < 0.6: M += 1 k = (N, float(M)/N) print (clock()-s) Running on win7 python 2.7 32 bit it uses around 30 seconds avg. Running on xubuntu, 32 bit, on vmware on windows 7: 20 seconds! The code runs faster on vm, than the computer itself... The python version in this case is 1.5 times faster... I don't understand. What causes this?