Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Mark Lawrence Newsgroups: comp.lang.python Subject: Re: The Cost of Dynamism (was Re: Pyhon 2.x or 3.x, which is faster?) Date: Wed, 23 Mar 2016 16:08:35 +0000 Lines: 34 Message-ID: References: <56e44258$0$1598$c3e8da3$5496439d@news.astraweb.com> <8737rvxs89.fsf@elektro.pacujo.net> <56e7483d$0$1608$c3e8da3$5496439d@news.astraweb.com> <56ef9787$0$1516$c3e8da3$5496439d@news.astraweb.com> <56f02196$0$1588$c3e8da3$5496439d@news.astraweb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de sSO8D7rRp27OQsLf1zUP0w2Lk7wd7ICAfr3JhCGDs4AQ== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'from:addr:yahoo.co.uk': 0.05; 'performs': 0.07; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:which': 0.09; 'python.': 0.11; 'algorithm.': 0.16; 'badly.': 0.16; 'character).': 0.16; 'language)': 0.16; 'measuring': 0.16; 'received:194.126': 0.16; 'received:80.91.229.3': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'subject:?)': 0.16; 'wrote:': 0.16; 'string': 0.17; 'beginner': 0.18; 'differ': 0.18; 'duplicate': 0.18; '(in': 0.18; 'language': 0.19; 'library': 0.20; 'lawrence': 0.22; '(where': 0.23; 'header :In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; 'header:X -Complaints-To:1': 0.26; 'rest': 0.26; 'executing': 0.27; 'function': 0.28; "skip:' 10": 0.28; "i'm": 0.30; 'code': 0.30; 'everyone': 0.31; 'language.': 0.32; 'problem': 0.33; 'behind': 0.35; 'could': 0.35; 'done': 0.35; 'cases': 0.36; "wasn't": 0.36; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'received:org': 0.37; 'doing': 0.38; 'means': 0.39; 'goes': 0.39; 'to:addr:python.org': 0.40; 'mark': 0.40; 'some': 0.40; 'subject:The': 0.61; 'received:194': 0.61; 'our': 0.64; 'here': 0.66; 'expresses': 0.84; 'pythonistas,': 0.84 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: 248.80.126.194.pool.dsl.daisyplc.net User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:105559 On 23/03/2016 10:34, BartC wrote: > On 23/03/2016 06:09, Ben Finney wrote: > >> The problem is that Bart simultaneously is a beginner at Python, and >> expresses astonishment that everyone shrugs when Bart's >> dreadfully-written code performs so badly. > > My interests differ from most people here writing Python. > > For example, I'm interested in byte-code (any byte-code) and what can be > done with it. Investigating how well it performs in 'extreme' cases > means executing algorithms predominantly in byte-code, not measuring how > well some library function (in some unspecified language) can cope with > the algorithm. > > And doing it 'Pythonically' can lead to suggestions such as the > following the other day: > > c, psource = psource[0], psource[1:] > > (where psource is a very long string), which even I could tell, from > knowing what goes on behind the scenes, wasn't going to work well > (duplicating the rest of the string roughly every other character). > It would work perfectly. How would it duplicate the rest of the string roughly every other character? -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence