From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.bugs Subject: bug#49127: Performance degradation in encode_coding_object Date: Wed, 18 Aug 2021 13:04:12 +0200 Message-ID: References: <83sfz970av.fsf@gnu.org> <4001E59F-63FF-4EF6-87B5-8A627871C4B8@acm.org> <83lf516x7o.fsf@gnu.org> <0FD46BCF-068E-4437-885A-D79F7ACD581F@acm.org> <837dgk6yic.fsf@gnu.org> <831r6s6u9u.fsf@gnu.org> <8CDC6E7F-73BF-4810-8218-04CD58316195@acm.org> <83wnok56vm.fsf@gnu.org> Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.21\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="3731"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 49127@debbugs.gnu.org, victor.nawothnig@icloud.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Aug 18 13:05:15 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 1mGJNh-0000hU-0C for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Aug 2021 13:05:13 +0200 Original-Received: from localhost ([::1]:55966 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mGJNe-0000zh-O6 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Aug 2021 07:05:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53978) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mGJNX-0000zL-Re for bug-gnu-emacs@gnu.org; Wed, 18 Aug 2021 07:05:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:43436) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mGJNW-0000EC-5E for bug-gnu-emacs@gnu.org; Wed, 18 Aug 2021 07:05:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mGJNW-0000nT-0V for bug-gnu-emacs@gnu.org; Wed, 18 Aug 2021 07:05:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 18 Aug 2021 11:05:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 49127 X-GNU-PR-Package: emacs Original-Received: via spool by 49127-submit@debbugs.gnu.org id=B49127.16292846653011 (code B ref 49127); Wed, 18 Aug 2021 11:05:01 +0000 Original-Received: (at 49127) by debbugs.gnu.org; 18 Aug 2021 11:04:25 +0000 Original-Received: from localhost ([127.0.0.1]:54982 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mGJMu-0000mU-UM for submit@debbugs.gnu.org; Wed, 18 Aug 2021 07:04:25 -0400 Original-Received: from mail1443c50.megamailservers.eu ([91.136.14.43]:56732 helo=mail264c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mGJMs-0000mE-A4 for 49127@debbugs.gnu.org; Wed, 18 Aug 2021 07:04:23 -0400 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1629284655; bh=uutEZV0PwmZRJLumTG+br0HrPotMi2GBbH/cFnRnGkw=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=ld4y6S94Hfwwo0qCtE6s2fiKfCwb4Q/n/59fpLP0BUcuDeAggdceEpZ3Lfkcve7AC N3qDKgcUoeSsC7A1BWZUhCiltOgDcBOx7X3fyCqEn+V+twbUjopEsOp7kBc/W7Zvly iJatVWm76l6v3tyNxtp7RoeGMrsSGsvk+pxEX4Yg= Feedback-ID: mattiase@acm.or Original-Received: from [192.168.0.4] (c188-150-171-71.bredband.tele2.se [188.150.171.71]) (authenticated bits=0) by mail264c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 17IB4DmP014027; Wed, 18 Aug 2021 11:04:15 +0000 In-Reply-To: <83wnok56vm.fsf@gnu.org> X-Mailer: Apple Mail (2.3445.104.21) X-CTCH-RefID: str=0001.0A742F19.611CE92F.0029, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=Xdb3M7x5 c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=U0Xgpp0EEs0JW2xwPXoA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Origin-Country: SE 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:212125 Archived-At: 17 aug. 2021 kl. 19.16 skrev Eli Zaretskii : > It's a problem to have many markers in a buffer. Not only for code > that searches them linearly, but also for stuff like converting > between character and byte positions, something that we do a lot in > the most inner loops of our code. Lisp programs that produce gobs of > markers should be ideally redesigned not to do so. I agree; the haskell-mode usage was misguided in this respect. = Marker-intensive modes could still be justified occasionally: consider = an index of all definitions and uses of each variable, function and type = in a program, produced by an expensive compilation that cannot be re-run = for each little change. This could easily amount to thousands of markers = in a big file. > Unless we change > the way we store markers to make that a non-issue. We probably should but I agree that marker reduction should be the first = remedy to try. Improving the GC so that it's cheaper to run frequent collections would = also help in the common case where most markers are dead (as in this = case).