220 24644 <56CDDA31.5090706@gmail.com> article Path: news.gmane.org!not-for-mail From: Robin Rowe Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: String class memory allocation Date: Wed, 24 Feb 2016 08:28:33 -0800 Lines: 40 Approved: news@gmane.org Message-ID: <56CDDA31.5090706@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed X-Trace: ger.gmane.org 1456331321 13771 80.91.229.3 (24 Feb 2016 16:28:41 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 24 Feb 2016 16:28:41 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCUOVZFOBEILDNFXWYCRUBCDRTLPU@isocpp.org Wed Feb 24 17:28:37 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f198.google.com ([209.85.214.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aYcIl-0001Mt-Ld for gclcip-std-proposals@m.gmane.org; Wed, 24 Feb 2016 17:28:35 +0100 Original-Received: by mail-ob0-f198.google.com with SMTP id gc3sf49457629obb.1 for ; Wed, 24 Feb 2016 08:28:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=to:from:subject:message-id:date:user-agent:mime-version :content-type:x-original-sender:x-original-authentication-results :reply-to:precedence:mailing-list:list-id:x-spam-checked-in-group :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=sWGN7+gffrVD8TiZ0ITSJ+poq60UPnBEx08tAhu/btI=; b=EwEYBbwl/cQ9kz77zBCcNQteUZbetkE5ig7e6Jb1e++HSaNa5rdWYhISJLtQyN8k/0 RPQx82eTN/Qlc5ZDAYOuwbnguuxxM9S13jm4FSPCzF3iQPYnjCEEH9hLVx1ocLyZQiOy aI0RDu6IUIPXjfOcvaXGT5Rgzhtttc/gvlFGHNjtU/CqMOFl/tY3zSNqSNha1y/1Cv/Q iIjgUVZcRNhVJO4lYIvvbKMGcMCvT+JBwKkZdw5L2AuSapSngXJi9pubcqGWdR7639jh ZSOd5PAgx4sj8Y4Xu2mPaxNBvtmCYYElrbKFj9cqqdXdbTJS+roel/X1WuLuX++de9OH 54Vw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=sWGN7+gffrVD8TiZ0ITSJ+poq60UPnBEx08tAhu/btI=; b=No+0YgWq9T8t8wIctII2RHvh0879NchPVzPlbn1ma6nYM4Iq3U53cXz3liVJpqO+/t Ini38/1bqyR+9BTk3dxZMSP9bgLuYnkv7LLW3DFuxHX++ki91h9Tt94bA87ZztxU7AS8 LPeKR+qXvnwhCzv6VmUdS9S4pRiB3T/49Z8vxxLgZF4xBukipYA3sm0WjB0934NAJqzk kTVm9wxAsJpLrX5gx5vE48hJ+XpL5uNmpHDIkzIBTZBbk++qSWgbaiHrULl1vjqRRtSO RMkvmAV98657jwgmFMK+ikIoD3lOuEKif2RKIg5SSWw9oSS32JCf0645aW4Yy7Hq8NVJ EzYQ== X-Gm-Message-State: AG10YOTdRO1+3ag2Ogye1NdbK3rtO31e5FbwB4lz7+yKxOxXO2olqwFED6odcmSyqfDtBw== X-Received: by 10.50.57.51 with SMTP id f19mr401047igq.0.1456331314793; Wed, 24 Feb 2016 08:28:34 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.168.83 with SMTP id r80ls127750ioe.88.gmail; Wed, 24 Feb 2016 08:28:33 -0800 (PST) X-Received: by 10.98.13.154 with SMTP id 26mr55985638pfn.164.1456331313293; Wed, 24 Feb 2016 08:28:33 -0800 (PST) Original-Received: from mail-pf0-x236.google.com (mail-pf0-x236.google.com. [2607:f8b0:400e:c00::236]) by mx.google.com with ESMTPS id h84si5838075pfd.171.2016.02.24.08.28.33 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Feb 2016 08:28:33 -0800 (PST) Received-SPF: pass (google.com: domain of robinsrowe@gmail.com designates 2607:f8b0:400e:c00::236 as permitted sender) client-ip=2607:f8b0:400e:c00::236; Original-Received: by mail-pf0-x236.google.com with SMTP id q63so15381747pfb.0 for ; Wed, 24 Feb 2016 08:28:33 -0800 (PST) X-Received: by 10.98.71.15 with SMTP id u15mr56169704pfa.161.1456331313088; Wed, 24 Feb 2016 08:28:33 -0800 (PST) Original-Received: from [192.168.1.145] (cpe-75-82-92-81.socal.res.rr.com. [75.82.92.81]) by smtp.googlemail.com with ESMTPSA id wh9sm6187947pab.8.2016.02.24.08.28.31 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 24 Feb 2016 08:28:31 -0800 (PST) User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 X-Original-Sender: robinsrowe@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of robinsrowe@gmail.com designates 2607:f8b0:400e:c00::236 as permitted sender) smtp.mailfrom=robinsrowe@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:24644 Archived-At: What's in the standard to avoid heap allocation during string creation? Is there a standard string class that doesn't use 'new', that works something like this? template class FixedLengthString { char buffer[bufsize] public: ... [ typical string interface ] }; FixedLengthString<80> s("hello world"); Is there a standard memory pool class, something like this? template class MemoryPoolString { static MemoryPool memoryPool;//shared by all strings char* buffer; public: MemoryPoolString() { if(!memoryPool) { memoryPool.Create(poolsize); } buffer=0; } ... }; My reason for caring is the cost of calling new on every string creation. Robin -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/56CDDA31.5090706%40gmail.com. .