From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: =?UTF-8?Q?Micha=c5=82_Kondraciuk?= Newsgroups: gmane.emacs.help Subject: Question about memory usage Date: Mon, 2 Apr 2018 13:57:26 +0200 Message-ID: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1522700725 14355 195.159.176.226 (2 Apr 2018 20:25:25 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 2 Apr 2018 20:25:25 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Apr 02 22:25:21 2018 Return-path: Envelope-to: geh-help-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 1f3610-0003Za-2z for geh-help-gnu-emacs@m.gmane.org; Mon, 02 Apr 2018 22:25:18 +0200 Original-Received: from localhost ([::1]:32989 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f3633-0004CH-O2 for geh-help-gnu-emacs@m.gmane.org; Mon, 02 Apr 2018 16:27:25 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53743) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f35MQ-0005XY-LO for help-gnu-emacs@gnu.org; Mon, 02 Apr 2018 15:43:23 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f35MM-00085u-PR for help-gnu-emacs@gnu.org; Mon, 02 Apr 2018 15:43:22 -0400 Original-Received: from sender-pp-092.zoho.com ([135.84.80.237]:25332) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f35MM-00084T-Hq for help-gnu-emacs@gnu.org; Mon, 02 Apr 2018 15:43:18 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=from:subject:to:message-id:date:user-agent:mime-version:content-type; b=Yl7vqVNrF2FrUx32iFYsCJ5dKLBcG3AaRSrFQPzDXIOstXlyLsWVOoKZnZXMNOfM2xG84ZmyXFMi hkF1NmQKZLa9Iebt6os3RrFZ+YZynS0gxQk8P1+Ydfs/b1ZUmffP Original-Received: from [192.168.0.87] (84-10-171-192.static.chello.pl [84.10.171.192]) by mx.zohomail.com with SMTPS id 1522670247990189.14254623190243; Mon, 2 Apr 2018 04:57:27 -0700 (PDT) Content-Language: en-US X-ZohoMailClient: External X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 135.84.80.237 X-Mailman-Approved-At: Mon, 02 Apr 2018 16:26:48 -0400 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:116314 Archived-At: Hello, Originally I wanted to report this to bug-gnu-emacs, but it's so basic that I thought I'd ask here instead. Basically, when I run the sexp below in emacs -Q, Emacs keeps allocating a lot of memory. In 10 minutes, it goes from 18 MB to over 200 MB. (while t (with-temp-buffer (setq buffer-undo-list nil) (insert "a"))) Calling garbage-collect afterwards or even inside the body of the loop doesn't help (except the loop obviously runs slower, so after 10 minutes, Emacs uses ~100 MB of memory). So I want to know if this behavior is expected for some reason? Does Emacs reuse this memory somehow (to make future allocations faster)? I tested on newest master and 25.3 and the behavior is the same.