Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: "Sven R. Kunze" Newsgroups: comp.lang.python Subject: Heap Implementation Date: Sat, 30 Jan 2016 23:47:31 +0100 Lines: 36 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de 5dTmJd9NExwRCTUQxfUNcAP8sUG1ttvmsCQc3S2G0vpg== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.057 X-Spam-Evidence: '*H*': 0.89; '*S*': 0.00; 'url:pypi': 0.03; 'rewrite': 0.07; 'url:github': 0.09; 'thread': 0.10; 'python': 0.10; 'weird': 0.15; 'formatting.': 0.16; 'heap': 0.16; 'heapq': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'fixing': 0.22; 'header:User-Agent:1': 0.26; 'compare': 0.27; 'switch': 0.27; 'topic': 0.32; 'url:python': 0.33; 'grateful': 0.33; 'open': 0.33; 'received:10.0': 0.34; 'best,': 0.35; 'url:org': 0.36; 'tool': 0.36; 'to:addr:python-list': 0.36; 'received:10': 0.37; 'really': 0.37; 'missing': 0.37; 'feedback': 0.38; 'to:addr:python.org': 0.40; 'received:de': 0.40; 'some': 0.40; 'your': 0.60; 'skip:u 10': 0.61; 'finally': 0.70; 'incredibly': 0.76; 'removal': 0.79; 'combo': 0.84; 'sweeping': 0.84; 'url:2016': 0.84; 'worried': 0.84; 'dare': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mail.de; s=mail201212; t=1454194054; bh=78YKc/DFfgeXVWovics6XcZx5DO6TcWzbSjxLetbTvY=; h=To:From:Subject:Date:From; b=aJuy80o0dGpwAS1CU6eQzPM+uN0C22M/4NrEOd/Wn8HwhUvaz0yRnVpBKV6LaViKz GQRTlvCo4VGMmwb2O6ZKHjvtBShxrNrdviEr8NiG5QPf1uOWaY2SFvsD2By/Jd7sLc VDQ1QbkYFxR0i0P7kFelkc/wF4WDYGcJJxroebno= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 X-purgate: clean X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate-type: clean X-purgate-Ad: Categorized by eleven eXpurgate (R) http://www.eleven.de X-purgate: This mail is considered clean (visit http://www.eleven.de for further information) X-purgate: clean X-purgate-size: 1135 X-purgate-ID: 154282::1454194054-00003BBD-2D22EA5A/0/0 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ 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:102324 Hi again, as the topic of the old thread actually was fully discussed, I dare to open a new one. I finally managed to finish my heap implementation. You can find it at https://pypi.python.org/pypi/xheap + https://github.com/srkunze/xheap. I described my motivations and design decisions at http://srkunze.blogspot.com/2016/01/fast-object-oriented-heap-implementation.html @Cem You've been worried about a C implementation. I can assure you that I did not intend to rewrite the incredibly fast and well-tested heapq implementation. I just re-used it. I would really be grateful for your feedback as you have first-hand experience with heaps. @srinivas You might want to have a look at the removal implementation. Do you think it would be wiser/faster to switch for the sweeping approach? I plan to publish some benchmarks to compare heapq and xheap. @all What's the best/standardized tool in Python to perform benchmarking? Right now, I use a self-made combo of unittest.TestCase and time.time + proper formatting. Best, Sven PS: fixing some weird typos and added missing part.