From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Chris Hanson Newsgroups: gmane.emacs.bugs Subject: bug#66288: 29.1; Performance regression using pipe for subprocess Date: Sat, 30 Sep 2023 20:57:31 -0400 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17374"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla Thunderbird To: 66288@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Oct 01 02:59:12 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 1qmkng-0004CI-2T for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 01 Oct 2023 02:59:12 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qmknP-0005Xr-Hv; 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Sun, 1 Oct 2023 00:57:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chris-hanson.org; s=gm1; t=1696121853; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=5W41lAMFj/aEZgCVPPQS5zKtMr3lHdXAipW9AeP7P8g=; b=Sf0FCdmDiSlCsm0P+rYFF6hji0k/4L9yK4qtv3MStffMU4pqrMK4TogIkCIipRWdBm7i3I RRJARfeYfl788TMHCEtYfF2lJ8tv7KmFJSYggb1AI0S9ZFoKS3M7vnhq8cuxJvmLSk+KBA JrrUM81uwcSWlDzBEmlAVj6iYpN86aITun9psHRhfN5zJl3y3XKvmoHYQ0E8XqVBr1WF7A YAjfcG7euKlwDrcIcCYzQv52iTfCx7h+dN7sDzz5a4tOE8FIDP2b19lFphWfvpD2CpbPGl AX5GptHYMTM1jvVPDH+XoyC8cg6IwU17Jw/p8ggqVrrqW1IGkGj9oD1oFbWk+A== Content-Language: en-US X-GND-Sasl: cph@chris-hanson.org Received-SPF: pass client-ip=217.70.183.201; envelope-from=cph@chris-hanson.org; helo=relay8-d.mail.gandi.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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:271578 Archived-At: When using "xscheme.el" to start and interact with MIT/GNU Scheme in a subprocess, the performance significantly degraded in Emacs 29.1. It worked well in older releases. Here is a recipe: emacs -Q M-x load-library RET xscheme RET M-x run-scheme RET and see how slowly the process output is printed as Scheme starts. Compare this to Emacs 28.2 or earlier. I've played around quite a bit to figure out what's going on, and found that changing xscheme-start-process so that start-process used a pty instead of a pipe eliminated the performance regression. That isn't really a solution since there's some complicated interrupt stuff going on that crashes the subprocess when a pty is used. I'm trying to track that down and fix it but have not succeeded so far. In GNU Emacs 29.1 (build 2, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw3d scroll bars) of 2023-08-03 built on kleph Windowing system distributor 'The X.Org Foundation', version 11.0.12101004 System Description: Ubuntu 22.04.3 LTS Configured using: 'configure --with-x-toolkit=athena --with-tree-sitter --with-native-compilation' Configured features: CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG LIBSELINUX LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XAW3D XDBE XIM XINPUT2 XPM LUCID ZLIB Important settings: value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Scheme Interaction Minor modes in effect: diff-auto-refine-mode: t windmove-mode: t which-function-mode: t which-key-mode: t savehist-mode: t global-git-commit-mode: t shell-dirtrack-mode: t server-mode: t global-edit-server-edit-mode: t desktop-save-mode: t global-auto-revert-mode: t override-global-mode: t global-eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t line-number-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: /home/cph/.emacs.d/elpa/transient-20230919.2146/transient hides /usr/local/share/emacs/29.1/lisp/transient /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package hides /usr/local/share/emacs/29.1/lisp/use-package/use-package /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-jump hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-jump /home/cph/.emacs.d/elpa/bind-key-20230203.2004/bind-key hides /usr/local/share/emacs/29.1/lisp/use-package/bind-key /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-bind-key hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-bind-key /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-delight hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-delight /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-lint hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-lint /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-core hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-core /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-diminish hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-diminish /home/cph/.emacs.d/elpa/use-package-20230426.2324/use-package-ensure hides /usr/local/share/emacs/29.1/lisp/use-package/use-package-ensure /home/cph/elisp/xscheme hides /usr/local/share/emacs/29.1/lisp/progmodes/xscheme /home/cph/.emacs.d/elpa/flim-20230808.1153/sasl hides /usr/local/share/emacs/29.1/lisp/net/sasl /home/cph/.emacs.d/elpa/seq-2.24/seq hides /usr/local/share/emacs/29.1/lisp/emacs-lisp/seq Features: (shadow mail-extr emacsbug pcmpl-gnu goto-addr perl-mode two-column delsel rect view ucs-normalize novice ibuf-ext wdired macros fileloop git-rebase markdown-mode eglot external-completion array jsonrpc ert ewoc flymake-proc flymake c-ts-mode arc-mode archive-mode sort pcmpl-unix vc-src vc-sccs vc-svn vc-cvs vc-rcs log-view vc bug-reference magit-extras face-remap magit-submodule magit-blame magit-stash magit-reflog magit-bisect magit-push magit-pull magit-fetch magit-clone magit-remote magit-commit magit-sequence magit-notes magit-worktree magit-tag magit-merge magit-branch magit-reset magit-files magit-refs magit-status magit magit-repos magit-apply magit-wip magit-log magit-diff smerge-mode diff magit-core magit-autorevert magit-margin magit-transient magit-process magit-mode git-timemachine tramp-cmds rfc2104 conf-mode compare-w pp ispell ibuffer ibuffer-loaddefs vc-hg vc-bzr tramp-cache time-stamp tramp-sh tramp tramp-loaddefs trampver tramp-integration tramp-compat tabify man pulse grep compile display-line-numbers shortdoc misearch multi-isearch help-fns radix-tree cl-print debug backtrace sh-script executable xscheme files-x mule-util org-indent org-element org-persist org-id org-refile avl-tree generator oc-basic ol-eww ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls dig gnus-sum gnus-group gnus-undo gnus-start gnus-dbus dbus gnus-cloud nnimap nnmail mail-source utf7 nnoo parse-time gnus-spec gnus-int gnus-range gnus-win ol-docview doc-view jka-compr image-mode exif ol-bibtex bibtex iso8601 ol-bbdb ol-w3m ol-doi org-link-doi org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-src ob-comint org-pcomplete org-list org-footnote org-faces org-entities noutline outline ob-emacs-lisp ob-core ob-eval org-cycle org-table ol org-fold org-fold-core org-keys oc org-loaddefs find-func cal-menu calendar cal-loaddefs org-version org-compat org-macs mhtml-mode css-mode smie eww xdg url-queue thingatpt shr pixel-fill kinsoku url-file svg xml mm-url gnus nnheader range wid-edit color rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid rng-loc rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn nxml-ns nxml-mode nxml-outln nxml-rap sgml-mode facemenu dom nxml-util nxml-enc xmltok scheme js c-ts-common treesit cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs dired-aux vc-git diff-mode vc-dispatcher whitespace zenburn-theme windmove which-func imenu which-key savehist git-commit magit-git magit-base magit-section cursor-sensor crm with-editor comp comp-cstr warnings icons shell pcomplete comint ansi-osc ansi-color transient format-spec server rx log-edit message sendmail yank-media puny rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util text-property-search time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils mailheader pcvs-util add-log compat finder-inf exec-path-from-shell edit-server advice dumb-jump popup dash s xref project ring dired-x dired dired-loaddefs desktop frameset cph-commands autorevert filenotify cl-extra help-mode edmacro kmacro use-package use-package-ensure use-package-delight use-package-diminish use-package-bind-key bind-key easy-mmode use-package-core dumb-jump-autoloads edit-server-autoloads exec-path-from-shell-autoloads git-timemachine-autoloads magit-autoloads pcase git-commit-autoloads magit-section-autoloads dash-autoloads markdown-mode-autoloads nov-autoloads esxml-autoloads kv-autoloads popup-autoloads s-autoloads transient-autoloads w3m-load w3m-autoloads wanderlust-autoloads semi-autoloads flim-autoloads oauth2-autoloads apel-autoloads which-key-autoloads with-editor-autoloads info compat-autoloads seq-autoloads package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic indonesian philippine cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget keymap hashtable-print-readable backquote threads dbusbind inotify dynamic-setting system-font-setting font-render-setting cairo x-toolkit xinput2 x multi-tty make-network-process native-compile emacs) Memory information: ((conses 16 1000671 332582) (symbols 48 42644 63) (strings 32 178355 25408) (string-bytes 1 6621053) (vectors 16 113786) (vector-slots 8 2668289 163190) (floats 8 662 413) (intervals 56 41165 25081) (buffers 984 86))