From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: ido-switch-buffer is slow with many buffers; others are fast Date: Sat, 14 Nov 2020 18:00:58 -0500 Message-ID: References: <87ima7nbic.fsf@catern.com> <87d00fn1ni.fsf@catern.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="22799"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: sbaugh@catern.com Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Nov 15 00:02:03 2020 Return-path: Envelope-to: ged-emacs-devel@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 1ke4YV-0005oy-4e for ged-emacs-devel@m.gmane-mx.org; Sun, 15 Nov 2020 00:02:03 +0100 Original-Received: from localhost ([::1]:36710 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ke4YU-0004ou-5Q for ged-emacs-devel@m.gmane-mx.org; Sat, 14 Nov 2020 18:02:02 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55442) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ke4XY-0004Mf-Th for emacs-devel@gnu.org; Sat, 14 Nov 2020 18:01:05 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:49286) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ke4XV-0000ql-AW for emacs-devel@gnu.org; Sat, 14 Nov 2020 18:01:03 -0500 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 4DED94410A8; Sat, 14 Nov 2020 18:01:00 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 20F234410A1; Sat, 14 Nov 2020 18:00:59 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1605394859; bh=yx4Xpo3QPQCsbzt10m60L++p+yBij1H40zmNCI1/3WQ=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=Ixe21Q4bva1PsV5zbpmo/+TO28UqwUa2YohcpOX0oE0vmllAu1bTIbr39s6XRNvFa t8QQLPDuaVUrOP+CvHligAar+GhKENDYNVV2Bt0j4I0jHZUWYR4rd1t+fFvbIKNRQ0 sJhQjyPRd00Dy9WMygG5g5UVokd2x7zptf7ZoSytu247ACNd816rJCmBjt7WyzHyOu 74uKsWQMJ++t+1ZfCF2VLomI68AmkguziEnveV4BqfzyC7shQHa89q2mgQjdmMqpdx IG8fioP9pyYjw86CjAz8958tyYjk2rgOQL+V+5MBl9lDJxq9tZoFRen+jiQHAKuCgI Q3urOYyYTpzMA== Original-Received: from alfajor (unknown [157.52.9.240]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id E704612016D; Sat, 14 Nov 2020 18:00:58 -0500 (EST) In-Reply-To: <87d00fn1ni.fsf@catern.com> (sbaugh@catern.com's message of "Sat, 14 Nov 2020 15:06:57 -0500") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/14 17:54:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:259186 Archived-At: > (setq-default case-fold-search t) (benchmark-run 1000 (string-match "" "")) > > is about 2000x faster than > > (benchmark-run 1000 (let ((case-fold-search t)) (string-match "" ""))) > > It seems this isn't (directly) related to my configuration, because a > fresh Emacs doesn't have the issue. Instead, it's something about my > running, 1000-buffer Emacs... not sure what would cause this or how to > fix it. Hmm... I think you'll need the use profiling to get to the bottom of it. I'd of course that with `profiler-start`, but there's a chance that you'll have to do the profiling at the level of the C code to better figure out what's going on. Stefan