From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#37321: 27.0.50; Excessive gc in a use case (el-search) Date: Thu, 26 Sep 2019 15:14:35 +0300 Message-ID: <83tv8zl0es.fsf@gnu.org> References: <87lfv1pm5x.fsf@web.de> <874l1mc01w.fsf@web.de> <87woeidd4g.fsf@web.de> <733d0142-51ee-55df-de0c-cca7c989b370@cs.ucla.edu> <875zlgu2y8.fsf@web.de> <6d670180-e2ee-030f-ef0e-ad0c5c7a8ef5@cs.ucla.edu> <87tv8zs2r9.fsf@web.de> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="15618"; mail-complaints-to="usenet@blaine.gmane.org" Cc: eggert@cs.ucla.edu, 37321@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Sep 26 14:16:41 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iDShM-0003xF-UP for geb-bug-gnu-emacs@m.gmane.org; Thu, 26 Sep 2019 14:16:41 +0200 Original-Received: from localhost ([::1]:34938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDShL-000695-E1 for geb-bug-gnu-emacs@m.gmane.org; Thu, 26 Sep 2019 08:16:39 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34251) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDSgl-0005Yc-Q7 for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 08:16:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iDSgk-00069J-QH for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 08:16:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:34032) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iDSgk-00068p-ND for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 08:16:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iDSgj-0002p8-Id for bug-gnu-emacs@gnu.org; Thu, 26 Sep 2019 08:16:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 26 Sep 2019 12:16:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 37321 X-GNU-PR-Package: emacs Original-Received: via spool by 37321-submit@debbugs.gnu.org id=B37321.15695001037634 (code B ref 37321); Thu, 26 Sep 2019 12:16:01 +0000 Original-Received: (at 37321) by debbugs.gnu.org; 26 Sep 2019 12:15:03 +0000 Original-Received: from localhost ([127.0.0.1]:42853 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iDSfn-0001ym-2h for submit@debbugs.gnu.org; Thu, 26 Sep 2019 08:15:03 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:53846) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iDSfk-0001xR-GE for 37321@debbugs.gnu.org; Thu, 26 Sep 2019 08:15:01 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:58549) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iDSfc-0004QA-3K; Thu, 26 Sep 2019 08:14:52 -0400 Original-Received: from [176.228.60.248] (port=1515 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iDSfa-0001sV-SD; Thu, 26 Sep 2019 08:14:51 -0400 In-reply-to: <87tv8zs2r9.fsf@web.de> (message from Michael Heerdegen on Thu, 26 Sep 2019 13:42:02 +0200) 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: 209.51.188.43 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:167233 Archived-At: > From: Michael Heerdegen > Date: Thu, 26 Sep 2019 13:42:02 +0200 > Cc: 37321@debbugs.gnu.org > > > That is, if you are observing significantly better performance with > > gc-cons-percentage set to 0.8, shouldn't we set it to be that value by > > default in Emacs? > > Good question. Could it have downsides (I guess garbage collection > would happen less often but take longer then so one could get noticeable > interrupts)? Using 0.8 means we won't GC before we cons 80% of the heap, which sounds too high. Btw, any reason why you enlarge gc-cons-percentage instead of gc-cons-threshold? The former is less determinate because it depends on the size of the heap, which you cannot control.