From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Fixxed buffer size for eshell Date: Sun, 30 Apr 2017 17:21:51 +0300 Message-ID: <83fugqkmbk.fsf@gnu.org> References: <20170430100252.ibyfpqkgibupjddh@gmail.com> NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1493562168 4647 195.159.176.226 (30 Apr 2017 14:22:48 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 30 Apr 2017 14:22:48 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Apr 30 16:22:44 2017 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 1d4pkK-00019p-A3 for geh-help-gnu-emacs@m.gmane.org; Sun, 30 Apr 2017 16:22:44 +0200 Original-Received: from localhost ([::1]:44821 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4pkQ-0002mV-3Z for geh-help-gnu-emacs@m.gmane.org; Sun, 30 Apr 2017 10:22:50 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39612) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4pjx-0002mQ-V6 for help-gnu-emacs@gnu.org; Sun, 30 Apr 2017 10:22:22 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d4pju-0008Pt-QV for help-gnu-emacs@gnu.org; Sun, 30 Apr 2017 10:22:21 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:47014) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d4pju-0008Pp-Mr for help-gnu-emacs@gnu.org; Sun, 30 Apr 2017 10:22:18 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2150 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1d4pju-00035q-2Y for help-gnu-emacs@gnu.org; Sun, 30 Apr 2017 10:22:18 -0400 In-reply-to: <20170430100252.ibyfpqkgibupjddh@gmail.com> (message from Anast Gramm on Sun, 30 Apr 2017 13:02:52 +0300) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e 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:112904 Archived-At: > Date: Sun, 30 Apr 2017 13:02:52 +0300 > From: Anast Gramm > > When I run a build command eshell gets filled with thousands of lines > with the compiler commands. > > This results in a huge buffer (>10mb) thus slowing down emacs. Large buffers shouldn't slow down Emacs. They don't here. And 10MB is not large by today's standards anyway. Can you show a recipe for reproducing the problem? Also, what Emacs version is that? > As a workaround I use the clear function copied straight out of > the emacsdev mailing list [1]. > > This is not ideal, since I use it after the buffer is filled, and emacs > is already slow at that point. > > What I want is a fixed buffer size, like in normal terminals where > you have a set amount of lines. You could write a function that removes old lines, and have it on post-command-hook. But you shouldn't need something like that, so I think you should report a bug and let the Emacs developers fix it or tell you how to avoid the slowdown in a more elegant way.