From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#28625: [PROPOSED] Speed up (format "%s" STRING) and the like Date: Sat, 07 Oct 2017 14:34:27 +0300 Message-ID: <83shevtcn0.fsf@gnu.org> References: <20170927185212.1846-1-eggert@cs.ucla.edu> <857ceb29-1ffc-6218-f756-a0bb9c3aa334@cs.ucla.edu> <3fe5e3e1-d027-dd48-9d79-a9e64774a1c6@cs.ucla.edu> <83wp47thj0.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1507376109 5014 195.159.176.226 (7 Oct 2017 11:35:09 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 7 Oct 2017 11:35:09 +0000 (UTC) Cc: 28625@debbugs.gnu.org, jwiegley@gmail.com, eggert@cs.ucla.edu To: Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Oct 07 13:35:04 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e0nNn-0000Uu-3a for geb-bug-gnu-emacs@m.gmane.org; Sat, 07 Oct 2017 13:35:03 +0200 Original-Received: from localhost ([::1]:49232 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e0nNu-00065d-Bv for geb-bug-gnu-emacs@m.gmane.org; Sat, 07 Oct 2017 07:35:10 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42050) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e0nNp-00065Y-Gg for bug-gnu-emacs@gnu.org; Sat, 07 Oct 2017 07:35:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e0nNm-0007B0-EH for bug-gnu-emacs@gnu.org; Sat, 07 Oct 2017 07:35:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:45114) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e0nNm-0007Ar-As for bug-gnu-emacs@gnu.org; Sat, 07 Oct 2017 07:35:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1e0nNm-0005rB-4H for bug-gnu-emacs@gnu.org; Sat, 07 Oct 2017 07:35:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 07 Oct 2017 11:35:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28625 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 28625-submit@debbugs.gnu.org id=B28625.150737608322473 (code B ref 28625); Sat, 07 Oct 2017 11:35:02 +0000 Original-Received: (at 28625) by debbugs.gnu.org; 7 Oct 2017 11:34:43 +0000 Original-Received: from localhost ([127.0.0.1]:53795 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e0nNT-0005qP-8v for submit@debbugs.gnu.org; Sat, 07 Oct 2017 07:34:43 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:50982) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e0nNR-0005qC-Qi for 28625@debbugs.gnu.org; Sat, 07 Oct 2017 07:34:42 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e0nNJ-0006nl-LC for 28625@debbugs.gnu.org; Sat, 07 Oct 2017 07:34:36 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:45883) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e0nNJ-0006nh-IB; Sat, 07 Oct 2017 07:34:33 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2528 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1e0nNI-0006K8-UC; Sat, 07 Oct 2017 07:34:33 -0400 In-reply-to: (message from Philipp Stephani on Sat, 07 Oct 2017 10:56:52 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:138042 Archived-At: > From: Philipp Stephani > Date: Sat, 07 Oct 2017 10:56:52 +0000 > Cc: jwiegley@gmail.com, eggert@cs.ucla.edu, 28625@debbugs.gnu.org > > > Shouldn't this at least be documented in the "Incompatible Lisp changes" section of NEWS? > > If it's incompatible, sure. Is it? Can you show the effect of the > incompatibility? > > $ emacs -Q -batch -eval '(let* ((a "a") (b (format "%s" a))) (aset a 0 ?b) (print b))' > > With Emacs 25.3 this prints "a", with current master it prints "b". You could see the same behavior with earlier versions when the string was empty, so we just expanded this behavior, not really changed it. However, I see your point, so I moved the entry into the Incompatible Lisp Changes section.