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bug#59787: 29.0.60; Very slow pos-visible-in-window-p with long truncate
From: |
Eli Zaretskii |
Subject: |
bug#59787: 29.0.60; Very slow pos-visible-in-window-p with long truncated lines |
Date: |
Fri, 02 Dec 2022 22:09:11 +0200 |
As reported in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=56682#1977:
2. after starting Isearch at a large column number,
Emacs hangs up indefinitely, e.g. with
'M-g TAB 10000000 RET C-s' then even C-g doesn't get out.
Debugging shows that the problem is in 'isearch-update'
where the call to 'pos-visible-in-window-group-p' doesn't return.
When this call is removed, the search is instantaneous.
(Optimizing lazy-highlight is a separate problem in bug#56815.)
The problem is that pos-visible-in-window-p starts from window-start point
and goes to the POSITION passed as argument using move_it_to, which in this
case is very slow, because it has all the 10000000 columns to traverse.
The solution is to introduce shortcuts into pos_visible_p in this case.
In GNU Emacs 29.0.60 (build 17, i686-pc-mingw32) of 2022-12-02 built on
HOME-C4E4A596F7
Repository revision: 4b3eb928fed4b236d1ae06ae7d9d51a4466554d2
Repository branch: emacs-29
Windowing system distributor 'Microsoft Corp.', version 5.1.2600
System Description: Microsoft Windows XP Service Pack 3 (v5.1.0.2600)
Configured using:
'configure -C --prefix=/d/usr --with-wide-int
--enable-checking=yes,glyphs 'CFLAGS=-O0 -gdwarf-4 -g3''
Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NOTIFY
W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB
Important settings:
value of $LANG: ENU
locale-coding-system: cp1255
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-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
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr dabbrev emacsbug message mailcap yank-media puny
dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg
rfc6068 epg-config gnus-util text-property-search time-date subr-x
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils rmc iso-transl tooltip cconv eldoc paren
electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode 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 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
w32notify w32 lcms2 multi-tty make-network-process emacs)
Memory information:
((conses 16 43232 13224)
(symbols 48 6330 6)
(strings 16 16709 3199)
(string-bytes 1 406733)
(vectors 16 9402)
(vector-slots 8 147021 11501)
(floats 8 25 28)
(intervals 40 273 112)
(buffers 896 10))
- bug#59787: 29.0.60; Very slow pos-visible-in-window-p with long truncated lines,
Eli Zaretskii <=