bug#15011: 24.3; Scrolling Performance

This bug report will be sent to the Bug-GNU-Emacs mailing list

and the GNU bug tracker at debbugs.gnu.org. Please check that

the From: line contains a valid email address. After a delay of up

to one day, you should receive an acknowledgment at that address.

Please write in English if possible, as the Emacs maintainers

usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and

the precise symptoms of the bug. If you can, give a recipe

starting from `emacs -Q':

Open large C++ file (17,000 line in this case). Hold down Page Down

key. Emacs will scroll two or three times and then pause for 15 seconds

or more. Once you have scrolled to the bottom of the file Page Down

will work reasonably, however page up remains slow. emacs -Q is

marginally faster than my configuration (just marginally). When doing

any scrolling the CPU is maxed. (core 2 duo)

Emacs GNU Emacs 22.3.1 (i386-mingw-nt6.1.7601) also has slower initial

scroll through, it does not however lock up and after the initial scroll

through both page up and page down display every single step. (Initial

scroll through is only marginally slower than subsequent ones).

If Emacs crashed, and you have the Emacs process in the gdb debugger,

please include the output from the following gdb commands:

`bt full' and `xbacktrace'.

For information about debugging Emacs, please read the file

c:/working_chad/emacs_new_current/emacs-24.3/etc/DEBUG.

In GNU Emacs 24.3.1 (i386-mingw-nt6.1.7601)

of 2013-03-17 on MARVIN

Windowing system distributor `Microsoft Corp.', version 6.1.7601

Configured using:

`configure --with-gcc (4.7) --cflags

-ID:/devel/emacs/libs/libXpm-3.5.8/include

-ID:/devel/emacs/libs/libXpm-3.5.8/src

-ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include

-ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include

-ID:/devel/emacs/libs/giflib-4.1.4-1/include

-ID:/devel/emacs/libs/jpeg-6b-4/include

-ID:/devel/emacs/libs/tiff-3.8.2-1/include

-ID:/devel/emacs/libs/gnutls-3.0.9/include

-ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include

-ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'

Important settings:

value of $LANG: ENU

locale-coding-system: cp1252

default enable-multibyte-characters: t

Major mode: Org

Minor modes in effect:

which-function-mode: t

global-auto-revert-mode: t

show-paren-mode: t

cua-mode: t

mouse-wheel-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

column-number-mode: t

line-number-mode: t

transient-mark-mode: t

Recent input:

<help-echo> <help-echo> <help-echo> <down-mouse-1>

<mouse-movement> <mouse-1> <C-prior> <C-home> C-z <up>

<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>

<triple-wheel-down> <triple-wheel-down> <help-echo>

<help-echo> <help-echo> <wheel-up> <double-wheel-up>

<down-mouse-1> <mouse-1> <menu-bar> <Org> <Logging

work> <Clock in> <help-echo> <menu-bar> <Org> <Logging

work> <Clock out> <menu-bar> <Org> <Logging work> <Clock

in> <help-echo> <down-mouse-1> <mouse-1> <wheel-up>

<double-wheel-up> <triple-wheel-up> <triple-wheel-up>

<triple-wheel-up> <triple-wheel-up> <down-mouse-1>

<mouse-1> <wheel-up> <double-wheel-up> <triple-wheel-up>

<triple-wheel-up> <wheel-down> <double-wheel-down>

<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>

<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>

<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>

<triple-wheel-up> <wheel-down> <double-wheel-down>

<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-movement>

<mouse-1> <down-mouse-1> <mouse-1> C-s c r e a t e

SPC u s <down-mouse-1> <mouse-1> c r e a t SPC <backspace>

e SPC u s e r SPC f o r t i s SPC i d e n t i f i e

d SPC b y SPC f o r t i s ; <return> <help-echo> <down-mouse-1>

<mouse-1> C-s g r a n t C-s C-s C-s <C-home> C-s C-s

<down-mouse-1> <mouse-1> g r a n t SPC d b a SPC t

o SPC f o r t i s ; <return> <help-echo> <down-mouse-1>

<mouse-movement> <wheel-up> <drag-mouse-1> <wheel-down>

<wheel-down> <wheel-down> <wheel-down> <double-wheel-down>

<triple-wheel-down> <triple-wheel-down> <down-mouse-1>

<mouse-1> <wheel-up> <double-wheel-up> <triple-wheel-up>

<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>

<triple-wheel-up> <wheel-up> <double-wheel-up> <triple-wheel-up>

<triple-wheel-up> <triple-wheel-up> <wheel-up> <double-wheel-up>

<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>

<C-kp-3> <C-f12> <wheel-down> <wheel-down> <wheel-down>

<wheel-down> <double-wheel-down> <triple-wheel-down>

<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>

<triple-wheel-down> <triple-wheel-down> <wheel-down>

<wheel-down> <double-wheel-down> <triple-wheel-down>

<triple-wheel-down> <help-echo> <wheel-up> <double-wheel-up>

<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>

<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>

<triple-wheel-up> <wheel-up> <wheel-down> <double-wheel-down>

<C-f12> <left> <left> <left> <left> C-c C-c <help-echo>

<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> <home>

<S-down> <delete> <up> C-c C-c <up> <up> <right> <down>

<Org> <Logging work> <Clock out> <menu-bar> <Org> <Logging

work> <Clock in> <help-echo> <down-mouse-1> <mouse-movement>

<mouse-1> M-x r e p o r t - e m <tab> <return>

Recent messages:

Clock starts at [2013-08-02 Fri 10:41] - showing entire task time.

byte-code: Beginning of buffer [13 times]

Mark saved where search started [2 times]

Mark set

Mark saved where search started

Auto-saving...done

Mark set

org-ctrl-c-ctrl-c: C-c C-c can do nothing useful at this location

Clock stopped at [2013-08-02 Fri 10:54] after HH:MM = 0:13

Clock starts at [2013-08-02 Fri 10:55] - showing entire task time.

Load-path shadows:

None found.

Features:

(shadow sort mail-extr emacsbug message rfc822 mml mml-sec mm-decode

mm-bodies mm-encode mailabbrev gmm-utils mailheader sendmail mail-utils

sql vc-cvs vc-rcs vc-dir ewoc vc misearch multi-isearch add-log

vc-dispatcher vc-svn hideshow help-mode tabify org-table org-clock

w32-fullscreen org-wl org-w3m org-vm org-rmail org-mhe org-mew org-irc

org-jsinfo org-infojs org-html org-exp ob-exp org-agenda org-info

org-gnus org-docview org-bibtex bibtex org-bbdb org ob-tangle ob-ref

ob-lob ob-table org-footnote org-src ob-comint ob-keys org-pcomplete

pcomplete org-list org-faces org-entities noutline outline easy-mmode

org-version ob-emacs-lisp ob ob-eval org-loaddefs format-spec cal-menu

calendar cal-loaddefs longlines confluence advice help-fns

advice-preload confluence-edit image-file browse-url thingatpt

ediff-merg ediff-diff ediff-wind ediff-help ediff-util ediff-mult

ediff-init ediff url-http tls url-auth mail-parse rfc2231 rfc2047

rfc2045 ietf-drums url-gw xml-rpc xml doc-view jka-compr image-mode

dired goto-last-change warnings server org-exp-blocks org-compat

org-macs find-func iimage php-mode etags cc-langs cl cc-mode cc-fonts

cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs

speedbar sb-image ezimage dframe easymenu ds-grep derived compile comint

ansi-color ring cl-macs gv cl-lib tempo url url-proxy url-privacy

url-expand url-methods url-history url-cookie url-domsuf url-util

url-parse auth-source eieio byte-opt bytecomp byte-compile cconv

gnus-util mm-util mail-prsvr password-cache url-vars mailcap xml-parse

doxymacs which-func imenu autorevert paren cua-base cus-start cus-load

time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel dos-w32

ls-lisp w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset

image regexp-opt fringe tabulated-list newcomment lisp-mode register

page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock

font-lock syntax facemenu font-core frame cham georgian utf-8-lang

misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew

greek romanian slovak czech european ethiopic indian cyrillic chinese

case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs

button faces cus-face macroexp files text-properties overlay sha1 md5

base64 format env code-pages mule custom widget hashtable-print-readable

backquote make-network-process w32 multi-tty emacs)

From:	Calkins, Chad M
Subject:	bug#15011: 24.3; Scrolling Performance
Date:	Fri, 2 Aug 2013 17:33:02 +0000