220 36822 <14112472.AvYaaQfdXc@tjmaciei-mobl1> article Path: news.gmane.org!.POSTED!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: String interpolation Date: Fri, 09 Feb 2018 00:24:36 -0800 Lines: 29 Approved: news@gmane.org Message-ID: <14112472.AvYaaQfdXc@tjmaciei-mobl1> References: <356d5835-f1bf-4699-94f5-0b2d3d0b9c0e@isocpp.org> <1731062.NdW3nXAon1@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1518164560 20294 195.159.176.226 (9 Feb 2018 08:22:40 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 9 Feb 2018 08:22:40 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBRVV6XJQKGQER5DRI3I@isocpp.org Fri Feb 09 09:22:36 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f199.google.com ([209.85.220.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ek3x3-0004rj-KN for gclcip-std-proposals@m.gmane.org; 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[209.222.10.136]) by mx.google.com with ESMTPS id y9si1961942qta.291.2018.02.09.00.24.38 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Feb 2018 00:24:38 -0800 (PST) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 209.222.10.136 as permitted sender) client-ip=209.222.10.136; Original-Received: from tjmaciei-mobl1.localnet (unknown [IPv6:2601:1c0:4501:5f9f:1898:5a56:9160:57ba]) by smtp.macieira.info (Postfix) with ESMTPSA id 4BAFD7F01 for ; Fri, 9 Feb 2018 00:24:37 -0800 (PST) In-Reply-To: X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 209.222.10.136 as permitted sender) smtp.mailfrom=thiago@macieira.org 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:36822 Archived-At: On Friday, 9 February 2018 00:05:44 PST Richard Hodges wrote: > It's a great idea. Naysayers talk of performance concerns as a result of > virtual functions. These are irrelevant. > > Firstly, the cost of turning numeric values into strings far outweighs the > cost of a virtual call That depends on a lot. The cost of a virtual call could easily get to 5% total time of a conversion, which is non-negligible, if there's no memory allocation involved. > Second, fixing iostream to make it more efficient is a separate concern. More than likely, doing that means replacing it entirely, which in turn means this feature cannot depend on iostreams. It must be generic, if it exists at all. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center -- 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. 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