bug#51799: 29.0.50; Editing C++ Files is Very Slow.

[Yusuf Talha]

When I open a C++ file in Emacs, editing and navigating commands

are taking so long with c++-mode.  I figured that the ‘c-fontify-new-found-type’

function in cc-engine.el causes it.  When I evaluate the old definition of

‘c-add-type’ function, it fixes the issue.  I would be glad if you can handle this.

Thank you.

In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, cairo version 1.17.4)

of 2021-11-12 built on localhost

Repository revision: 18eec5720e3b49c0f9efb646bb896ba4e9549ea0

Repository branch: master

Windowing system distributor 'The X.Org Foundation', version 11.0.12013000

System Description: Gentoo Linux

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 --datarootdir=/usr/share

--disable-silent-rules --docdir=/usr/share/doc/emacs-29.0.9999

--htmldir=/usr/share/doc/emacs-29.0.9999/html --libdir=/usr/lib64

--program-suffix=-emacs-29-vcs --includedir=/usr/include/emacs-29-vcs

--infodir=/usr/share/info/emacs-29-vcs --localstatedir=/var

--enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp

--without-compress-install --without-hesiod --without-pop

--with-file-notification=inotify --with-pdumper --enable-acl

--with-dbus --with-modules --with-gameuser=:gamestat --with-libgmp

--with-gpm --with-native-compilation --with-json --without-kerberos

--without-kerberos5 --with-lcms2 --with-xml2 --with-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

--without-imagemagick --with-xft --with-cairo --with-harfbuzz

--without-libotf --without-m17n-flt --with-x-toolkit=no

--with-dumping=pdumper 'CFLAGS=-march=native -mtune=native -O2 -pipe'

CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''

Configured features:

ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM HARFBUZZ JPEG JSON LCMS2

LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY OLDXMENU PDUMPER PNG RSVG

SECCOMP SOUND THREADS TIFF WEBP X11 XDBE XIM XPM ZLIB

Important settings:

value of $LANG: en_US.utf8

locale-coding-system: utf-8-unix

Major mode: Text

Minor modes in effect:

shell-dirtrack-mode: t

electric-pair-mode: t

display-time-mode: t

display-battery-mode: t

dired-async-mode: t

tooltip-mode: t

global-eldoc-mode: t

show-paren-mode: t

electric-quote-mode: t

electric-indent-mode: t

mouse-wheel-mode: t

tab-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

column-number-mode: t

line-number-mode: t

indent-tabs-mode: t

transient-mark-mode: t

Load-path shadows:

/usr/share/emacs/site-lisp/cmake-mode hides /usr/share/emacs/site-lisp/cmake/cmake-mode

/usr/share/emacs/site-lisp/desktop-entry-mode hides /usr/share/emacs/site-lisp/desktop-file-utils/desktop-entry-mode

Features:

(uudecode uce supercite regi spam-report spam spam-stat gnus-uu yenc

gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime gnus-sum shr

kinsoku svg dom gnus-group gnus-undo gnus-start gnus-dbus gnus-cloud

nnimap nnmail mail-source nnoo gnus-spec gnus-int gnus-range gnus-win

smtpmail sieve-manage sasl sasl-anonymous sasl-login sasl-plain pop3

mspools mh-e mh-compat mh-buffers mh-loaddefs mairix imap rfc2104 utf7

hashcash gnus-dired fortune feedmail ecomplete binhex mail-hist epa-mail

add-log tramp tramp-loaddefs trampver tramp-integration files-x

tramp-compat parse-time iso8601 ls-lisp ntlm hmac-md5 hex-util md4 nsm

netrc net-utils ldap kermit shell pcomplete gravatar dns url-cache

gnutls eudc-vars dig bug-reference ange-ftp comint ansi-color mailalias

mailclient qp noutline outline kmacro facemenu two-column goto-addr view

shadow sort mail-extr emacsbug message yank-media rmc puny rfc822 mml

mml-sec epa derived epg rfc6068 epg-config mm-decode mm-bodies mm-encode

mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail cc-bytecomp

cl-print apropos cus-edit pp cus-start pulse color xref project

eieio-opt cl-extra speedbar ezimage dframe find-func shortdoc cc-langs

thingatpt cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align

cc-engine cc-vars cc-defs misearch multi-isearch smerge-mode diff-mode

diff mule-util ebuild-mode skeleton sh-script smie executable

display-fill-column-indicator display-line-numbers server pinentry

format-spec modus-vivendi-theme modus-themes pcase gnus nnheader

gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums

text-property-search time-date mail-utils mm-util mail-prsvr wid-edit

elec-pair time battery dbus xml dired-async async dired-aux dired

dired-loaddefs cus-load google-translate-mode easy-mmode site-gentoo

geiser-impl help-fns radix-tree help-mode geiser-custom geiser-base ring

info package browse-url url url-proxy url-privacy url-expand url-methods

url-history url-cookie url-domsuf url-util mailcap url-handlers

url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs

password-cache json map url-vars seq gv subr-x byte-opt bytecomp

byte-compile cconv cl-loaddefs cl-lib iso-transl tooltip 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 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 emoji-zwj charscript charprop case-table

epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice

button loaddefs faces cus-face macroexp files window text-properties

overlay sha1 md5 base64 format env code-pages mule custom widget

hashtable-print-readable backquote threads dbusbind inotify lcms2

dynamic-setting font-render-setting cairo x multi-tty

make-network-process native-compile emacs)

Memory information:

((conses 16 507526 32717)

(symbols 48 26920 7)

(strings 32 91090 4235)

(string-bytes 1 3058380)

(vectors 16 55147)

(vector-slots 8 1576641 38054)

(floats 8 481 583)

(intervals 56 9713 940)

(buffers 992 26))