Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Stephen Hansen Newsgroups: comp.lang.python Subject: Re: Fastest way to retrieve and write html contents to file Date: Sun, 01 May 2016 23:27:32 -0700 Lines: 29 Message-ID: References: <85vb2xgj2i.fsf@benfinney.id.au> <1462166136.1167243.595273897.291B0865@webmail.messagingengine.com> <1462170452.1180117.595306673.68B64F02@webmail.messagingengine.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de IwVJKApv9zPKERMJRVKSewsWAZp6t3UZRXHAk6cn28Mw== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'skip:% 20': 0.07; 'subject:file': 0.07; 'urllib2': 0.07; 'received:internal': 0.09; 'slow.': 0.09; 'size,': 0.13; '10:59': 0.16; 'dfs': 0.16; 'enough.': 0.16; 'message-id:@webmail.messagingengine.com': 0.16; 'received:10.202': 0.16; 'received:10.202.2': 0.16; 'received:66.111': 0.16; 'received:66.111.4': 0.16; 'received:io': 0.16; 'received:messagingengine.com': 0.16; 'received:psf.io': 0.16; 'wrote:': 0.16; 'comparing': 0.18; 'otherwise,': 0.20; 'constant': 0.22; 'stephen': 0.22; 'file.': 0.22; 'demonstrate': 0.23; "haven't": 0.24; 'header:In-Reply-To:1': 0.24; 'all.': 0.24; 'skip:u 20': 0.28; "i'm": 0.30; 'print': 0.30; 'point': 0.33; 'downloading': 0.33; 'file': 0.34; 'but': 0.36; 'to:addr:python- list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'received:10': 0.37; 'two': 0.37; 'seem': 0.37; 'difference': 0.38; 'received:66': 0.38; 'to:addr:python.org': 0.40; "you'll": 0.61; 'header:Message- Id:1': 0.61; 'back': 0.62; 'believe': 0.66; 'of:': 0.66; 'answered,': 0.84; 'meg': 0.84; 'subject:write': 0.84; 'toy': 0.84 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=ixokai.io; h= content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-sasl-enc :x-sasl-enc; s=mesmtp; bh=86eYIhdR67KWAzbiEh3nuF+A4CQ=; b=MOrMoU z0iIYxFLUO1HqfoYQtfq6NF2gCYgbdNiZIOnx1f0O5Inn/GaKOskurzLVWmn0dn3 YJLgpp/O9js3ynzfnsZp8F7pTfbaGd6pxHevRqX7QG7n7BVLFz+SAIsrdHniSlrH sC8GQfZxSpzv3ABtT8QZZFvpPBWsqnXcDKFb8= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-sasl-enc:x-sasl-enc; s=smtpout; bh=86eYIhdR67KWAzb iEh3nuF+A4CQ=; b=YkzgwaZt+VVhInsASHSRe2FRVO8glalbHbKQY0ciBQrkBZZ 6XR7626sLBaHpigtv2AENwvtkU8LpJuf/oMWi3/ehrmQEzqgNHErG8DRqFqfkw8N ljU/LFN94xnHJHTkN+hvbuCpghnXuDogSu0tnHhBsHc2AnfALPBdFqGzI9Wg= X-Sasl-Enc: pcntRd7sVk7XEXNnD8IzCbI9q53rQP1HT0eJfk904Sjp 1462170452 X-Mailer: MessagingEngine.com Webmail Interface - ajax-491eb5a4 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: <1462170452.1180117.595306673.68B64F02@webmail.messagingengine.com> X-Mailman-Original-References: <85vb2xgj2i.fsf@benfinney.id.au> <1462166136.1167243.595273897.291B0865@webmail.messagingengine.com> Xref: csiph.com comp.lang.python:107992 On Sun, May 1, 2016, at 10:59 PM, DFS wrote: > startTime = time.clock() > for i in range(loops): > r = urllib2.urlopen(webpage) > f = open(webfile,"w") > f.write(r.read()) > f.close > endTime = time.clock() > print "Finished urllib2 in %.2g seconds" %(endTime-startTime) Yeah on my system I get 1.8 out of this, amounting to 0.18s. I'm again going back to the point of: its fast enough. When comparing two small numbers, "twice as slow" is meaningless. You have an assumption you haven't answered, that downloading a 10 meg file will be twice as slow as downloading this tiny file. You haven't proven that at all. I suspect you have a constant overhead of X, and in this toy example, that makes it seem twice as slow. But when downloading a file of size, you'll have the same constant factor, at which point the difference is irrelevant. If you believe otherwise, demonstrate it. -- Stephen Hansen m e @ i x o k a i . i o