GNU bug report logs -
#24938
25.1; 25.1 slow cursor movement with Unicode on Windows
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Reported by: "Peromsik, Aaron" <peromsik <at> ptc.com>
Date: Sun, 13 Nov 2016 20:14:02 UTC
Severity: normal
Found in version 25.1
Done: Eli Zaretskii <eliz <at> gnu.org>
Bug is archived. No further changes may be made.
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Your message dated Mon, 14 Nov 2016 05:33:38 +0200
with message-id <83eg2eivl9.fsf <at> gnu.org>
and subject line Re: bug#24938: 25.1; 25.1 slow cursor movement with Unicode on Windows
has caused the debbugs.gnu.org bug report #24938,
regarding 25.1; 25.1 slow cursor movement with Unicode on Windows
to be marked as done.
(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)
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24938: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24938
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Emacs 25.1 on Windows, including the new optimized build, is much
slower than Emacs 24.5 was when navigating files which contain Unicode
characters such as ▩ . Cursor movement noticeably stutters when using
arrow keys or typing on a line which contains that character. Just try
moving the cursor along the two lines below to see the difference:
Char: ▩ (9641, #o22651, #x25a9, file ...) point=299 of 4451 (7%) column=19
Char: (9641, #o22651, #x25a9, file ...) point=299 of 4451 (7%) column=19
In GNU Emacs 25.1.1 (x86_64-w64-mingw32)
of 2016-11-10 built on LAPHROAIG
Windowing system distributor 'Microsoft Corp.', version 6.1.7601
Configured using:
'configure --without-dbus --without-compress-install 'CFLAGS=-O2
-static''
Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS
Important settings:
value of $LANG: C
locale-coding-system: cp1252
Major mode: Text
Minor modes in effect:
midnight-mode: t
auto-image-file-mode: t
diff-auto-refine-mode: t
shell-dirtrack-mode: t
display-time-mode: t
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
auto-fill-function: do-auto-fill
transient-mark-mode: t
Recent messages:
Loading magit-autorevert...done
Loading midnight...done
Loading paren...done
0 buffers purged
For information about GNU Emacs and the GNU system, type C-h C-a.
GNU Emacs 25.1.1 (x86_64-w64-mingw32) of 2016-11-10
d:/home/peromsik/fixes/41regp30/tha_bas_assmcut_bf02_p20/p30ntmp/std.out
Mark saved where search started [2 times]
d:/home/peromsik/fixes/41regp30/tha_bas_assmcut_bf02_p20/p30imr/std.out
Mark saved where search started [2 times]
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message format-spec rfc822 mml mml-sec
password-cache epg gnus-util mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util help-fns mail-prsvr mail-utils dired-aux misearch
multi-isearch org-install esh-var esh-io esh-cmd esh-opt esh-ext
esh-proc esh-arg esh-groups eshell esh-module esh-mode esh-util
jka-compr paren midnight magit-autorevert autorevert filenotify
magit-git cl-seq crm magit-section magit-utils dash ido icomplete
image-file cus-start cus-load server ps-print ps-def lpr diff-mode
easy-mmode grep compile ediff-merg ediff-wind ediff-diff ediff-mult
ediff-help ediff-init ediff-util ediff ccase ptctags ptcsrc warnings
advice dired-x dired ptc-comment aap-autoload shell pcomplete comint
ansi-color ring cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs time finder-inf go-mode-autoloads
info package epg-config seq byte-opt gv bytecomp byte-compile cl-extra
help-mode easymenu cconv cl-loaddefs pcase cl-lib time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 ls-lisp disp-table w32-win w32-vars term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment
elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
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 charscript
case-table epa-hook jka-cmpr-hook help simple abbrev 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 multi-tty
make-network-process emacs)
Memory information:
((conses 16 255848 15149)
(symbols 56 33020 0)
(miscs 48 127 185)
(strings 32 77739 8844)
(string-bytes 1 2075782)
(vectors 16 27303)
(vector-slots 8 674830 18474)
(floats 8 473 135)
(intervals 56 1273 1083)
(buffers 976 70))
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> From: "Peromsik, Aaron" <peromsik <at> ptc.com>
> CC: "24938 <at> debbugs.gnu.org" <24938 <at> debbugs.gnu.org>
> Date: Sun, 13 Nov 2016 21:43:50 +0000
>
> Yes, that's much better. Thanks!
OK, closing.
> (Though it does raise the question... how many times should font caches be compacted while the user moves the mouse across lines which are already displayed on the screen?)
With some fonts, the cache is compacted on every GC, and GC happens
very frequently. So in your case, the answer is probably "every
cursor movement".
This bug report was last modified 8 years and 186 days ago.
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