From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#62975: 29.0.90; Forking processes on macOS has become very slow in Emacs 29 Date: Thu, 20 Apr 2023 21:58:09 +0300 Message-ID: <83sfcu4bzy.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11495"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 62975@debbugs.gnu.org To: "John Wiegley" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Apr 20 20:59:08 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 1ppZUq-0002mY-LK for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 20 Apr 2023 20:59:08 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ppZUm-0000Z5-2y; Thu, 20 Apr 2023 14:59:04 -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 1ppZUk-0000Yx-Pz for bug-gnu-emacs@gnu.org; Thu, 20 Apr 2023 14:59:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ppZUk-00071d-Gn for bug-gnu-emacs@gnu.org; Thu, 20 Apr 2023 14:59:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ppZUk-0000bJ-29 for bug-gnu-emacs@gnu.org; Thu, 20 Apr 2023 14:59:02 -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, 20 Apr 2023 18:59:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 62975 X-GNU-PR-Package: emacs Original-Received: via spool by 62975-submit@debbugs.gnu.org id=B62975.16820170892237 (code B ref 62975); Thu, 20 Apr 2023 18:59:02 +0000 Original-Received: (at 62975) by debbugs.gnu.org; 20 Apr 2023 18:58:09 +0000 Original-Received: from localhost ([127.0.0.1]:38711 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ppZTt-0000a0-2q for submit@debbugs.gnu.org; Thu, 20 Apr 2023 14:58:09 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:53416) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ppZTr-0000Zn-Cl for 62975@debbugs.gnu.org; Thu, 20 Apr 2023 14:58:07 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ppZTg-0006QA-1v; Thu, 20 Apr 2023 14:57:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=KAiS4iXmRxYNDpZCmXzUkV/4u90kin2/v7Au/JngwqI=; b=paxgTy6cSweZ ijyNPZSOlvGuT10V66fShcjhnUxroZ4IOPgyfuJ6o3+hMFySAb50k4eARf7OT85gvqNIKXm4aXTKr bDvhd+1nybe7mjCEmHDBex4XvDXxppmO4HlM/jkTGiB/6ESyKMzPcuDkmmgcVUhuwRMQ3fkShYvgm 6BA/jY3k2GJvNFfZpWOPD2Z0EAZUPOX5lgqb6fQ8U9YTB+jZXX34jh2XIoFS6vFllMg9/xC4v4U92 YZIULhw74AHxNMOpJ+fKE0zyqetF3yTo8WiQ6pG8jcaqEPUU8hQchZIJwZsFUa9oCTvUfWbLqtzu4 JHXxhp0LlVlxF0+9S9KXsg==; Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ppZTe-0001vS-FR; Thu, 20 Apr 2023 14:57:55 -0400 In-Reply-To: (johnw@gnu.org) 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:260360 Archived-At: > From: "John Wiegley" > Date: Thu, 20 Apr 2023 11:41:24 -0700 > > I noticed after upgrading to 29.0.90 that Emacs felt very sluggish. I was able > to track this down to slow forking behavior, such as what happened in Emacs 26 > days. As an example, I started with emacs -Q and then loaded magit and used it > to check for changes in one of my local repositories. These are the timings > for just hitting 'g': > > 28.2 Refreshing magit...done (0.298s, cached 11/25 (44%)) > 28.2-Macport Refreshing magit...done (0.140s, cached 6/16 (38%)) > 29.0.90 Refreshing magit...done (1.495s, cached 11/25 (44%)) > > As you can see, with identical configuration (-Q) and the same Git project, > refreshing takes 7 times longer with Emacs 29 than it did with Emacs 28. Thanks. Can someone else who uses Emacs 29 on macOS reproduce this regression in performance relative to Emacs 28?