From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Spencer Baugh Newsgroups: gmane.emacs.bugs Subject: bug#64735: 29.0.92; find invocations are ~15x slower because of ignores Date: Fri, 21 Jul 2023 15:31:37 -0400 Message-ID: References: <1fd5e3ed-e1c3-5d6e-897f-1d5d55e379fa@gutov.dev> <87wmyupvlw.fsf@localhost> <5c4d9bea-3eb9-b262-138a-4ea0cb203436@gutov.dev> <87tttypp2e.fsf@localhost> <87ilaepkaw.fsf@localhost> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35116"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: Dmitry Gutov , 64735@debbugs.gnu.org To: Ihor Radchenko Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jul 21 21:32:19 2023 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 1qMvrP-0008ua-Aj for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 21 Jul 2023 21:32:19 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qMvrE-0000YN-Dv; Fri, 21 Jul 2023 15:32:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qMvrA-0000Up-DA for bug-gnu-emacs@gnu.org; Fri, 21 Jul 2023 15:32:04 -0400 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qMvr8-0004vP-7v for bug-gnu-emacs@gnu.org; Fri, 21 Jul 2023 15:32:04 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1qMvr8-0003J8-4j for bug-gnu-emacs@gnu.org; Fri, 21 Jul 2023 15:32:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Spencer Baugh Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 21 Jul 2023 19:32:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 64735 X-GNU-PR-Package: emacs Original-Received: via spool by 64735-submit@debbugs.gnu.org id=B64735.168996790612691 (code B ref 64735); Fri, 21 Jul 2023 19:32:02 +0000 Original-Received: (at 64735) by debbugs.gnu.org; 21 Jul 2023 19:31:46 +0000 Original-Received: from localhost ([127.0.0.1]:34924 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qMvqs-0003Id-A5 for submit@debbugs.gnu.org; Fri, 21 Jul 2023 15:31:46 -0400 Original-Received: from mxout5.mail.janestreet.com ([64.215.233.18]:37927) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qMvqp-0003IK-Bc for 64735@debbugs.gnu.org; Fri, 21 Jul 2023 15:31:44 -0400 In-Reply-To: <87ilaepkaw.fsf@localhost> (Ihor Radchenko's message of "Thu, 20 Jul 2023 17:25:11 +0000") 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:265757 Archived-At: Ihor Radchenko writes: > Spencer Baugh writes: > >>> Sure. It might also be optimized. Without trying to convince find devs >>> to do something about regexp handling. >> >> Not to derail too much, but find as a subprocess has one substantial >> advantage over find in Lisp: It can run in parallel with Emacs, so that >> we actually use multiple CPU cores. > > Does find use multiple CPU cores? Not on its own, but when it's running as a separate subprocess of Emacs, that subprocess can (and will, on modern core-rich hardware) run on a different CPU core from Emacs itself. That's a form of parallelism which is very achievable for Emacs, and provides a big performance win.