From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen 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 21:42:30 +0100 Message-ID: <87r1lry5hl.fsf@gnus.org> 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="24532"; 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: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Feb 07 21:43:13 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 1l8qtk-0006HU-VS for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Feb 2021 21:43:12 +0100 Original-Received: from localhost ([::1]:57166 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l8qtj-0001Z1-Ky for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 07 Feb 2021 15:43:11 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50394) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l8qta-0001Yv-KS for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:43:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:37402) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l8qta-0007Kr-CH for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:43:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1l8qta-00032X-AL for bug-gnu-emacs@gnu.org; Sun, 07 Feb 2021 15:43:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 07 Feb 2021 20:43:02 +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=B22763.161273056211656 (code B ref 22763); Sun, 07 Feb 2021 20:43:02 +0000 Original-Received: (at 22763) by debbugs.gnu.org; 7 Feb 2021 20:42:42 +0000 Original-Received: from localhost ([127.0.0.1]:48948 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l8qtG-00031v-K7 for submit@debbugs.gnu.org; Sun, 07 Feb 2021 15:42:42 -0500 Original-Received: from quimby.gnus.org ([95.216.78.240]:39676) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l8qtF-00031i-4T for 22763@debbugs.gnu.org; Sun, 07 Feb 2021 15:42:41 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=DFYgijxmazsaf/j7ouyNsuSmEUgczU2W5U0EJBaoRQc=; b=uvhWKTtJU9eH7u67emTwpmgX28 TEG2yS9amvnXtB/zeqRC76m/hY6wcVdVj0wlo+x/IGn7Rcb0I+qhxAUOdjqV0YFQIh0ch2Zdr0xnI PV3uwoF2rvKt9ratMeojvn302EpdiSbs8K62d+/jOLNppubLCwqAf6SnisugqNVkIAaE=; Original-Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l8qt5-0004is-0B; Sun, 07 Feb 2021 21:42:33 +0100 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAMAAABg3Am1AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAM1BMVEUAAAEWFhUlJSUF AxdOTk4zMTZubmx+f3tgYGGMjYkfHx9NSjczLkUiHDcSDC2ZmDT////IVuXkAAAAAWJLR0QQlbIN LAAAAAd0SU1FB+UCBBYKOcK+W+YAAAFWSURBVEjH7VTbdsIwDKuvNSVp//9vJ6cwyg47NU97GDo0 LUGypaRkmv4IxMxSJbOaKWuOViiNjxBuROMaYHpJZHc1nz0iaGZ1Zw18uThG/PpDFDyRGbNhMCNF CF1QG1PZAwQ9ljfzoAVPad5cNTICBsIz57yj/UMiOmNi9BQgS46B7B6AYr4RbvCL5yraFdazWCgu xzKFZwAQYuajpyC3Qx64iYC7R02b6BhimJlgAJnRRRWr4zGeBnh6iTDNvLgZJAr9TrffBE/bfSmQ nhX0puC96rv1ag9pra9Ai8LLClBbB39tq7aKwNbeQO9r72ur/CFQ2vpO76LngkV66wmFMennuyGS 7AZjXeDs3NPeAG76yoYo5wJYR2z4sW3bloKlXJ9cWLlCUDlrxh6Mndg2Wwr7IHIXwFXp7UhBBk9F 7fSTb0H1tByuQC+frvtpU2d/8ME/hXwB5W8NHHkY9qUAAAAldEVYdGRhdGU6Y3JlYXRlADIwMjEt MDItMDRUMjI6MTA6NTcrMDA6MDB2ytaIAAAAJXRFWHRkYXRlOm1vZGlmeQAyMDIxLTAyLTA0VDIy OjEwOjU3KzAwOjAwB5duNAAAAABJRU5ErkJggg== X-Now-Playing: Kid Creole & The Coconuts's _I'm A Wonderful Thing, Baby_: "I'm A Wonderful Thing, Baby (Brothers In Rhythm 12" Remix)" In-Reply-To: (Stefan Monnier's message of "Sun, 07 Feb 2021 15:37:28 -0500") 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:199564 Archived-At: Stefan Monnier writes: >> 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). Right, and in that case a cached version would definitely be faster on repeated executions. Why does display_count_lines (with no cache) exist, then? Historical reasons? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no