C-n and C-p are extremely slow (>10 sec to move one visual line) when moving around a large org buffer in overview state, especially right after opening the file. The issue seems to be with low-level vertical-motion command - M-: (vertical-motion 1) also takes >10sec on some lines. Steps to reproduce (emacs -Q): 1. Open the attached org file 2. C-n, C-n, C-n, C-n 3. Observe emacs hanging for >10sec. In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, X toolkit) of 2019-01-13 built on yantar92-laptop Windowing system distributor 'The X.Org Foundation', version 11.0.12003000 Recent messages: Making completion list... You can run the command ‘profiler-reset’ with M-x pr-res RET Quit -1 (#o377777777777777777777, #x3fffffffffffffff) Making completion list... Quit Making completion list... user-error: No further undo information Quit 1 (#o1, #x1, ?\C-a) Quit Configured using: 'configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --disable-silent-rules --docdir=/usr/share/doc/emacs-26.1-r3 --htmldir=/usr/share/doc/emacs-26.1-r3/html --libdir=/usr/lib64 --program-suffix=-emacs-26 --infodir=/usr/share/info/emacs-26 --localstatedir=/var --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp --without-compress-install --without-hesiod --without-pop --with-file-notification=inotify --enable-acl --with-dbus --with-modules --without-gameuser --with-gpm --without-kerberos --without-kerberos5 --with-lcms2 --with-xml2 --without-mailutils --without-selinux --with-gnutls --without-libsystemd --with-threads --without-wide-int --with-zlib --with-sound=alsa --with-x --without-ns --without-gconf --without-gsettings --without-toolkit-scroll-bars --with-gif --with-jpeg --with-png --with-rsvg --with-tiff --with-xpm --with-imagemagick --with-xft --without-cairo --without-libotf --without-m17n-flt --with-x-toolkit=lucid --with-xaw3d 'CFLAGS=-march=broadwell -pipe -O2' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed'' Configured features: XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS NOTIFY ACL GNUTLS LIBXML2 FREETYPE XFT ZLIB LUCID X11 MODULES THREADS LCMS2 Important settings: value of $LANG: en_US.utf8 value of $XMODIFIERS: @im=imsettings locale-coding-system: utf-8-unix Major mode: Org Minor modes in effect: tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr time-stamp profiler emacsbug sendmail org-duration org-rmail org-mhe org-irc org-info org-gnus nnir gnus-sum gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail mail-source tls gnutls utf7 netrc nnoo parse-time gnus-spec gnus-int gnus-range message rmc puny seq byte-opt gv bytecomp byte-compile cconv rfc822 mml mml-sec password-cache epa derived epg epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader gnus-win gnus nnheader gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums mail-utils mm-util mail-prsvr wid-edit org-docview doc-view jka-compr image-mode dired dired-loaddefs org-bibtex bibtex org-bbdb org-w3m org-element cl-seq avl-tree generator org advice org-macro org-footnote org-pcomplete pcomplete org-list org-faces org-entities noutline outline easy-mmode org-version ob-emacs-lisp ob ob-tangle org-src ob-ref ob-lob ob-table ob-keys ob-exp ob-comint comint ansi-color ring ob-core ob-eval org-compat org-macs org-loaddefs format-spec find-func cal-menu easymenu calendar cal-loaddefs cl-loaddefs cl-lib elec-pair time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type 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 elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame cl-generic 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 charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote dbusbind inotify lcms2 dynamic-setting font-render-setting x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 299128 44290) (symbols 48 30479 3) (miscs 40 55308 6589) (strings 32 63232 2240) (string-bytes 1 1952225) (vectors 16 46945) (vector-slots 8 1085988 21536) (floats 8 207 207) (intervals 56 736 59) (buffers 992 15)) -- Ihor Radchenko
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