From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#22763: 25.1.50; Feature Request -- A faster method to obtain line number at position. Date: Sun, 07 Feb 2021 15:37:28 -0500 Message-ID: References: <83y4aclofm.fsf@gnu.org> <878s7z532u.fsf@gnus.org> <87y2fz3lpe.fsf@gnus.org> <87h7mn22ls.fsf@gnus.org> <83eehrn408.fsf@gnu.org> <87y2fzzqxb.fsf@gnus.org> <87tuqnzqh2.fsf@gnus.org> <83blcvn1ku.fsf@gnu.org> <87czxbznly.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="3669"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 22763@debbugs.gnu.org, esq@lawlist.com To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Feb 07 21:38:11 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l8qos-0000s3-B8 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Feb 2021 21:38:10 +0100 Original-Received: from localhost ([::1]:55022 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l8qor-0000Jy-A2 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Feb 2021 15:38:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49472) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l8qok-0000Hq-09 for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:38:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:37398) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l8qoj-0005C3-NC for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:38:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1l8qoj-0002vR-LQ for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:38:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 07 Feb 2021 20:38:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 22763 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: fixed Original-Received: via spool by 22763-submit@debbugs.gnu.org id=B22763.161273025911213 (code B ref 22763); Sun, 07 Feb 2021 20:38:01 +0000 Original-Received: (at 22763) by debbugs.gnu.org; 7 Feb 2021 20:37:39 +0000 Original-Received: from localhost ([127.0.0.1]:48944 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l8qoM-0002um-VV for submit@debbugs.gnu.org; Sun, 07 Feb 2021 15:37:39 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:20311) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l8qoK-0002uZ-87 for 22763@debbugs.gnu.org; Sun, 07 Feb 2021 15:37:37 -0500 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id E58C0440C45; Sun, 7 Feb 2021 15:37:30 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id A7FAE440C51; Sun, 7 Feb 2021 15:37:29 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1612730249; bh=Yn9/Z1ehsH/+fQn46REiqTv1ieXGpEkqaVHA1tzDwcA=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=Vlt08ZZxtrRRTDeT4sIXi5/4nOGvCf2GA12PGdDaI7Al+oVhCnmMsH7oYQJRZz9Cl JV04GA8GpVRWkZzGclHclltNJ8F5lnpJIWdfm6FjyAS9tmTLogN0uHBHRsYhvOyXIT qHB965Ne/yAa9TTBvH0Db77UqkFaMu3gffOPzwSyxCJ8kNftaMMTWUB/72hw9AT7Dz 9lU544G3UbFT8eKgtRSqrGLbdSbawYW1r6czhprWUsVA7Zt3aFgZjMGRmTmu13uDH9 IgHnpdPo/VnWyn2guuaLZZBO5HxzcofoYe0+Cg7QXLy9DqEEpHOpjYiYBUjdB4TCSp gUZfWPKZXmRgw== Original-Received: from alfajor (unknown [216.154.41.47]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 6D5CC120406; Sun, 7 Feb 2021 15:37:29 -0500 (EST) In-Reply-To: <87czxbznly.fsf@gnus.org> (Lars Ingebrigtsen's message of "Sun, 07 Feb 2021 20:25:45 +0100") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:199563 Archived-At: > So ... it's using the cache is only faster when we have monumentally > long lines, since memchr is so fast? And in buffers with lines with > normal line lengths, it's 10x slower? That sounds like a rather drastic > trade-off. Yes, the problem is when you have pathologically-long lines (typically, when the whole file has virtually no \n in it, so lines can reach multi-MB lengths). Stefan