A HTML file with the following contents edits slowly in Emacs. Circle digits make Emacs editing slow.

Circle digits make Emacs editing slow.

In GNU Emacs 26.1 (build 1, x86_64-w64-mingw32) of 2018-05-30 built on CIRROCUMULUS Repository revision: 07f8f9bc5a51f5aa94eb099f3e15fbe0c20ea1ea Windowing system distributor 'Microsoft Corp.', version 10.0.17763 Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Mark set next-line: End of buffer [2 times] Configured using: 'configure --without-dbus --host=x86_64-w64-mingw32 --without-compress-install 'CFLAGS=-O2 -static -g3'' Configured features: XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS THREADS LCMS2 Important settings: value of $LANG: ENU locale-coding-system: cp1252 Major mode: HTML+ Minor modes in effect: tooltip-mode: t global-eldoc-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 auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc dired dired-loaddefs rfc822 mml mml-sec epa epg mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail mhtml-mode css-mode smie color eww puny mm-url gnus nnheader gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums mail-utils wid-edit mm-util mail-prsvr url-queue url url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf url-util mailcap shr svg xml browse-url format-spec js advice json map imenu thingatpt cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs sgml-mode dom flyspell ispell gnugo derived pcase easy-mmode finder-inf package easymenu epg-config url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache url-vars seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars term/common-win 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 w32notify w32 lcms2 multi-tty make-network-process emacs) Memory information: ((conses 16 182056 9066) (symbols 56 28776 1) (miscs 48 46 100) (strings 32 55484 1494) (string-bytes 1 1575587) (vectors 16 23685) (vector-slots 8 599403 8040) (floats 8 242 43) (intervals 56 759 1450) (buffers 992 12)) Sent from Mail for Windows 10