* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
@ 2012-02-17 5:41 Chong Yidong
2012-02-17 5:48 ` Chong Yidong
0 siblings, 1 reply; 13+ messages in thread
From: Chong Yidong @ 2012-02-17 5:41 UTC (permalink / raw)
To: 10835
See thread discussion here:
http://lists.gnu.org/archive/html/emacs-devel/2012-02/msg00517.html
To recap:
1. emacs -Q
2. M-x shell RET
3. ls /usr/share/doc (Prints about 2000 lines on my computer)
4. Repeat step 6-7 times (e.g. M-p RET)
The insertion of the shell output is significantly slower than in Emacs
23. If you set `bidi-paragraph-direction' to `left-to-right', the
slowdown mostly disappears.
If you scroll the shell buffer, it is also more sluggish when
`bidi-paragraph-direction' is nil.
Another observation: if you save the *shell* buffer to a file and visit
the file in another Emacs instance, there is no sluggishness if the file
is opened in (say) text mode. Maybe something in Shell mode is
interacting badly with the bidi code, but I don't know what.
In GNU Emacs 24.0.93.7 (x86_64-unknown-linux-gnu, GTK+ Version 3.2.0)
of 2012-02-15 on furball
Windowing system distributor `The X.Org Foundation', version 11.0.11004000
Configured using:
`configure '--with-x-toolkit=gtk3' 'CFLAGS=-g''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: en_US.UTF-8
value of $LC_CTYPE: en_US.UTF-8
value of $LC_MESSAGES: en_US.UTF-8
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: nil
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Emacs-Lisp
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 5:41 bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode Chong Yidong
@ 2012-02-17 5:48 ` Chong Yidong
2012-02-17 8:21 ` Andreas Schwab
2012-02-17 16:08 ` Eli Zaretskii
0 siblings, 2 replies; 13+ messages in thread
From: Chong Yidong @ 2012-02-17 5:48 UTC (permalink / raw)
To: 10835
Chong Yidong <cyd@gnu.org> writes:
> http://lists.gnu.org/archive/html/emacs-devel/2012-02/msg00517.html
>
> 1. emacs -Q
> 2. M-x shell RET
> 3. ls /usr/share/doc (Prints about 2000 lines on my computer)
> 4. Repeat step 6-7 times (e.g. M-p RET)
To follow up on some questions from the thread:
> I see nothing like that, the display never freezes. Strange. What
> kind of CPU do you have there? Is it a GUI session or a TTY session?
> Does Emacs run on the local machine or remote one?
It happens on both GUI sessions and TTY, run locally on an Intel i7
processor; Emacs was compiled without optimizations.
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 5:48 ` Chong Yidong
@ 2012-02-17 8:21 ` Andreas Schwab
2012-02-17 13:42 ` Chong Yidong
2012-02-17 16:08 ` Eli Zaretskii
1 sibling, 1 reply; 13+ messages in thread
From: Andreas Schwab @ 2012-02-17 8:21 UTC (permalink / raw)
To: Chong Yidong; +Cc: 10835
Chong Yidong <cyd@gnu.org> writes:
> Chong Yidong <cyd@gnu.org> writes:
>
>> http://lists.gnu.org/archive/html/emacs-devel/2012-02/msg00517.html
>>
>> 1. emacs -Q
>> 2. M-x shell RET
>> 3. ls /usr/share/doc (Prints about 2000 lines on my computer)
>> 4. Repeat step 6-7 times (e.g. M-p RET)
What is your shell prompt?
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 5:48 ` Chong Yidong
2012-02-17 8:21 ` Andreas Schwab
@ 2012-02-17 16:08 ` Eli Zaretskii
2012-02-17 17:39 ` Chong Yidong
1 sibling, 1 reply; 13+ messages in thread
From: Eli Zaretskii @ 2012-02-17 16:08 UTC (permalink / raw)
To: Chong Yidong; +Cc: 10835
> From: Chong Yidong <cyd@gnu.org>
> Date: Fri, 17 Feb 2012 13:48:26 +0800
>
> It happens on both GUI sessions and TTY, run locally on an Intel i7
> processor; Emacs was compiled without optimizations.
On an i7, I'd expect no slowdown at all.
How much time does it take `ls' to produce that 2K-line listing on
your machine, outside of Emacs and with a warm cache?
Also, can you put a printf after this line from xdisp.c:
else if (it->bidi_it.charpos == bob
|| (!string_p
&& (FETCH_CHAR (it->bidi_it.bytepos - 1) == '\n'
|| FETCH_CHAR (it->bidi_it.bytepos) == '\n')))
{
/* If we are at the beginning of a line/string, we can produce
the next element right away. */
bidi_paragraph_init (it->paragraph_embedding, &it->bidi_it, 1); <<<<<<
and tell me once in how many characters or lines of input from `ls' is
bidi_paragraph_init called here? E.g., to see the character count,
print it->bidi_it.charpos just before that line. (You could do the
same from breakpoint commands, but I'm afraid that doing so will
change the timing of how frequently the process output is read by
Emacs, and will therefore produce a biased estimation.)
TIA
^ permalink raw reply [flat|nested] 13+ messages in thread* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 16:08 ` Eli Zaretskii
@ 2012-02-17 17:39 ` Chong Yidong
2012-02-17 18:27 ` Eli Zaretskii
0 siblings, 1 reply; 13+ messages in thread
From: Chong Yidong @ 2012-02-17 17:39 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 10835
[-- Attachment #1: Type: text/plain, Size: 1775 bytes --]
Eli Zaretskii <eliz@gnu.org> writes:
> can you put a printf after this line from xdisp.c:
>
> else if (it->bidi_it.charpos == bob
> || (!string_p
> && (FETCH_CHAR (it->bidi_it.bytepos - 1) == '\n'
> || FETCH_CHAR (it->bidi_it.bytepos) == '\n')))
> {
> /* If we are at the beginning of a line/string, we can produce
> the next element right away. */
> bidi_paragraph_init (it->paragraph_embedding, &it->bidi_it, 1); <<<<<<
>
> and tell me once in how many characters or lines of input from `ls' is
> bidi_paragraph_init called here? E.g., to see the character count,
> print it->bidi_it.charpos just before that line.
Here are the line numbers at which the printf is triggered (and how many
times consecutively they get triggered, in parentheses):
1 (x 5)
0 (x 16)
10 (x 2)
1 (x 3)
0 (x 16)
68 (x 4)
37
1606 (x 3)
0 (x 16)
125 (x 4)
94
93 (x 3)
0 (x 16)
183 (x 4)
152
151 (x 3)
0 (x 16)
241 (x 4)
210 (x 4)
0 (x 16)
299 (x 4)
268
267 (x 3)
0 (x 16)
358 (x 4)
327
326 (x 3)
0 (x 16)
417 (x 4)
386
385 (x 3)
0 (x 16)
476 (x 4)
445
444 (x 3)
0 (x 16)
533 (x 4)
502
501 (x 3)
0 (x 16)
590 (x 4)
559
558 (x 3)
0 (x 16)
...
and so on. This is over one single ls call. The 0's are when
it->bidi_it.charpos == 0, the rest are charpos's converted into buffer
line numbers.
The pattern seems to be 3 calls at each window end, then 1 on the second
line of the window, then 4 on the first window line.
After many `ls' calls, when redisplay has become sluggish, the pattern is
the same.
...
6788 (x 4)
6757
6756 (x 3)
0 (x 16)
6846 (x 4)
6815
6814 (x 3)
0 (x 16)
6897 (x 4)
6866
6865 (x 3)
0 (x 16)
The shell output for one ls call is attached, in case it is useful.
[-- Attachment #2: shell.txt --]
[-- Type: text/plain, Size: 40394 bytes --]
~ $ ls /usr/share/doc
accountsservice libnm-util2
acl libnotify4
acpid libnspr4
acpi-support libnspr4-0d
ada-reference-manual-text libnss3
adduser libnss3-1d
adium-theme-ubuntu libnss-mdns
alacarte libnuma1
alsa-base libnux-1.0-0
alsa-utils libnux-1.0-common
anacron liboauth0
apache2 libofa0
apache2.2-bin libogg0
apache2.2-common liboil0.3
apache2-mpm-worker libopenal1
apache2-utils libopencore-amrnb0
apg libopencore-amrwb0
apparmor libopenexr6
app-install-data libopenmpi1.3
app-install-data-partner libopenmpi-dev
apport libopenobex1
apport-hooks-medibuntu liborbit2
apport-symptoms liborc-0.4-0
apt libp11-kit0
aptdaemon libpam0g
aptdaemon-data libpam-ck-connector
apt-transport-https libpam-gnome-keyring
apturl libpam-modules
apturl-common libpam-modules-bin
apt-utils libpam-runtime
aspell libpanel-applet-4-0
aspell-en libpango1.0-0
at libpango1.0-dev
autoconf libpangomm-1.4-1
automake libpango-perl
autotools-dev libpaper1
avahi-autoipd libpaper-utils
avahi-daemon libparted0debian1
avahi-utils libpathplan4
bamfdaemon libpcap0.8
baobab libpci3
base-files libpciaccess0
base-passwd libpcre3
bash libpcrecpp0
bash-completion libpcsclite1
bc libpeas-1.0-0
bind9-host libpeas-common
binfmt-support libperl5.12
binutils libpipeline1
blcr-dkms libpixman-1-0
blcr-util libpixman-1-dev
blt libplist1
bluez libplymouth2
bluez-alsa libpng12-0
bluez-cups libpng12-dev
bluez-gstreamer libpod-plainer-perl
brasero libpolkit-agent-1-0
brasero-cdrkit libpolkit-backend-1-0
brasero-common libpolkit-gobject-1-0
bsdmainutils libpoppler13
bsdutils libpoppler-glib6
build-essential libpopt0
busybox-initramfs libpostproc52
busybox-static libprotobuf7
bzip2 libproxy0
bzr libpth20
bzrtools libpthread-stubs0
c2esp libpthread-stubs0-dev
cabextract libpulse0
ca-certificates libpulse-mainloop-glib0
ca-certificates-java libpurple0
caribou libpurple-bin
clisp libpython2.7
cmap-adobe-japan1 libqhull5
colord libqrupdate1
compiz libqt4-dbus
compizconfig-backend-gconf libqt4-declarative
compizconfig-settings-manager libqt4-designer
compiz-core libqt4-network
compiz-gnome libqt4-opengl
compiz-plugins libqt4-qt3support
compiz-plugins-default libqt4-script
compiz-plugins-main libqt4-scripttools
compiz-plugins-main-default libqt4-sql
consolekit libqt4-sql-mysql
console-setup libqt4-svg
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cpio libqt4-xml
cpp libqt4-xmlpatterns
cpp-4.4 libqtbamf1
cpp-4.6 libqtcore4
cron libqtdee2
cups libqtgconf1
cups-bsd libqtgui4
cups-client libquadmath0
cups-common libquvi0
cups-driver-gutenprint libraptor2-0
cups-pk-helper librarian0
cups-ppdc librasqal3
curl libraw1394-11
cvs librdf0
dash libreadline5
dbus libreadline6
dbus-x11 libreadline6-dev
dc libreadline-dev
dconf-gsettings-backend libreoffice-base-core
debconf libreoffice-calc
debconf-i18n libreoffice-common
debhelper libreoffice-core
debianutils libreoffice-draw
deborphan libreoffice-emailmerge
defoma libreoffice-gnome
desktop-base libreoffice-gtk
desktop-file-utils libreoffice-impress
dialog libreoffice-math
dictionaries-common libreoffice-style-human
diffutils libreoffice-writer
dkms librest-0.7-0
dmidecode librsvg2-2
dmsetup librsvg2-common
dnsmasq-base librtmp0
dnsutils libruby1.8
doc-base libsamplerate0
docbook-xml libsane
dosfstools libsane-hpaio
dpkg libsasl2-2
dpkg-dev libsasl2-modules
dvd+rw-tools libschroedinger-1.0-0
e2fslibs libsdl1.2debian
e2fsprogs libsdl1.2debian-alsa
ed libsdl-image1.2
eject libselinux1
empathy libsensors4
empathy-common libsgutils2-2
eog libshout3
esound-common libsidplay1
evince libsigc++-2.0-0c2a
evince-common libsigsegv2
evolution-data-server-common libslang2
exiv2 libslp1
exo libslv2-9
exo-utils libsm6
fakeroot libsmbclient
fbreader libsm-dev
fglrx libsndfile1
fglrx-amdcccle libsnmp15
file libsnmp-base
file-roller libsoundtouch0
findutils libsoup2.4-1
firefox libsoup-gnome2.4-1
firefox-globalmenu libspectre1
firefox-gnome-support libspeex1
firefox-locale-en libspeexdsp1
flashplugin-downloader libsqlite3-0
flashplugin-installer libsqlite3-dev
fontconfig libss2
fontconfig-config libssl1.0.0
fonts-horai-umefont libssl-dev
foo2zjs libssl-doc
foomatic-db-compressed-ppds libstartup-notification0
foomatic-db-engine libstdc++6
foomatic-filters libstdc++6-4.6-dev
freepats libsuitesparse-dev
friendly-recovery libsvga1
ftp libswitch-perl
fuse-utils libswscale2
g++ libsysfs2
g++-4.6 libsys-hostname-long-perl
gamin libt1-5
gcc libtag1c2a
gcc-4.4 libtag1-vanilla
gcc-4.4-base libtalloc2
gcc-4.6 libtar0
gcc-4.6-base libtasn1-3
gconf2 libtasn1-3-dev
gconf2-common libtdb1
gconf-defaults-service libtelepathy-farsight0
gconf-editor libtelepathy-glib0
gdb libtelepathy-logger2
gedit libtemplates-parser11.5
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genisoimage libtextcat-data
geoclue libtext-charwidth-perl
geoclue-ubuntu-geoip libtext-iconv-perl
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gettext libthai0
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gfortran libtheora0
gfortran-4.6 libthunarx-2-0
ghostscript libtidy-0.99-0
ghostscript-cups libtiff4
ghostscript-x libtiff4-dev
gimp libtiffxx0c2
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gir1.2-accountsservice-1.0 libtinfo5
gir1.2-appindicator3-0.1 libtinfo-dev
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gir1.2-atspi-2.0 libtorque2
gir1.2-caribou-1.0 libtotem0
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gir1.2-cogl-1.0 libts-0.0-0
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gir1.2-dee-0.5 libudev0
gir1.2-folks-0.6 libumfpack5.4.0
gir1.2-freedesktop libunique-3.0-0
gir1.2-gconf-2.0 libunistring0
gir1.2-gdkpixbuf-2.0 libunity-2d-private0
gir1.2-gee-1.0 libunity6
gir1.2-gkbd-3.0 libunity-core-4.0-4
gir1.2-glib-2.0 libunity-misc4
gir1.2-gmenu-3.0 libupnp3
gir1.2-gnomebluetooth-1.0 libupower-glib1
gir1.2-gtk-2.0 liburi-perl
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gir1.2-gtksource-3.0 libusb-1.0-0
gir1.2-json-1.0 libusbmuxd1
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gir1.2-networkmanager-1.0 libutouch-evemu1
gir1.2-notify-0.7 libutouch-frame1
gir1.2-panelapplet-4.0 libutouch-geis1
gir1.2-pango-1.0 libutouch-grail1
gir1.2-peas-1.0 libuuid1
gir1.2-polkit-1.0 libuuid-perl
gir1.2-soup-2.4 libv4l-0
gir1.2-telepathyglib-0.12 libv8-3.1.8.22
gir1.2-telepathylogger-0.2 libva1
gir1.2-totem-1.0 libva-x11-1
gir1.2-totem-plparser-1.0 libvcdinfo0
gir1.2-unity-4.0 libvdpau1
gir1.2-upowerglib-1.0 libvisual-0.4-0
gir1.2-vte-2.90 libvisual-0.4-plugins
gir1.2-webkit-3.0 libvlc5
git libvlccore4
git-man libvorbis0a
gjs libvorbisenc2
gksu libvorbisfile3
glib-networking libvpx0
gnat libvte-2.90-9
gnat-4.4 libvte9
gnat-4.4-base libvte-common
gnat-gps libwavpack1
gnat-gps-doc libwbclient0
gnome-accessibility-themes libwebkitgtk-1.0-0
gnome-applets libwebkitgtk-1.0-common
gnome-applets-data libwebkitgtk-3.0-0
gnome-bluetooth libwebkitgtk-3.0-common
gnome-codec-install libwildmidi1
gnome-control-center libwmf0.2-7
gnome-control-center-data libwmf0.2-7-gtk
gnome-desktop3-data libwmf-bin
gnome-desktop-data libwnck22
gnome-disk-utility libwnck-3-0
gnome-exe-thumbnailer libwnck-3-common
gnome-font-viewer libwnck-common
gnome-icon-theme libwpd-0.9-9
gnome-icon-theme-full libwpg-0.2-2
gnome-icon-theme-symbolic libwps-0.2-2
gnome-keyring libwrap0
gnome-media libwww-perl
gnome-menus libwww-robotrules-perl
gnome-nettool libwxbase2.8-0
gnome-online-accounts libwxgtk2.8-0
gnome-panel libx11-6
gnome-panel-data libx11-data
gnome-power-manager libx11-dev
gnome-screensaver libx11-xcb1
gnome-session libx264-116
gnome-session-bin libx86-1
gnome-session-common libxapian22
gnome-session-fallback libxau6
gnome-settings-daemon libxau-dev
gnome-shell libxaw7
gnome-system-log libxaw7-dev
gnome-system-monitor libxcb1
gnome-terminal libxcb1-dev
gnome-terminal-data libxcb-dri2-0
gnome-themes-standard libxcb-keysyms1
gnome-user-guide libxcb-randr0
gnome-user-share libxcb-render0
gnome-utils-common libxcb-render0-dev
gnupg libxcb-shape0
gnuplot libxcb-shm0
gnuplot-nox libxcb-shm0-dev
gnuplot-x11 libxcb-util0
gpgv libxcb-xv0
grep libxcomposite1
groff libxcomposite-dev
groff-base libxcursor1
gromit libxcursor-dev
growisofs libxdamage1
grub2-common libxdamage-dev
grub-common libxdmcp6
grub-gfxpayload-lists libxdmcp-dev
grub-pc libxext6
grub-pc-bin libxext-dev
gs-cjk-resource libxfce4ui-1-0
gsettings-desktop-schemas libxfce4util4
gsfonts libxfce4util-bin
gstreamer0.10-alsa libxfce4util-common
gstreamer0.10-ffmpeg libxfconf-0-2
gstreamer0.10-fluendo-mp3 libxfixes3
gstreamer0.10-gconf libxfixes-dev
gstreamer0.10-nice libxfont1
gstreamer0.10-plugins-bad libxft2
gstreamer0.10-plugins-base libxft-dev
gstreamer0.10-plugins-base-apps libxi6
gstreamer0.10-plugins-good libxi-dev
gstreamer0.10-plugins-ugly libxinerama1
gstreamer0.10-pulseaudio libxinerama-dev
gstreamer0.10-tools libxkbfile1
gstreamer0.10-x libxklavier16
gtk2-engines libxml2
gtk2-engines-murrine libxml2-dev
gtk2-engines-xfce libxml2-utils
gtk3-engines-unico libxmu6
gvfs libxmu-dev
gvfs-backends libxmu-headers
gvfs-bin libxmuu1
gvfs-fuse libxpm4
gzip libxpm-dev
hdparm libxrandr2
hicolor-icon-theme libxrandr-dev
hostname libxrender1
hpijs libxrender-dev
hplip libxres1
hplip-cups libxslt1.1
hplip-data libxslt1-dev
html2text libxss1
humanity-icon-theme libxt6
hunspell-en-ca libxt-dev
hunspell-en-us libxtst6
hwdata libxv1
hyphen-en-us libxvidcore4
ia32-crossover-games-demo libxvmc1
ia32-libs libxxf86dga1
ia32-libs-multiarch libxxf86vm1
icc-profiles-free libyajl1
icedtea-6-jre-cacao libyaml-tiny-perl
icedtea-6-jre-jamvm libyelp0
icedtea6-plugin libzbar0
icedtea-netx libzeitgeist-1.0-1
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info linux-firmware
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initscripts linux-headers-3.0.0-14-generic
inkscape linux-headers-3.0.0-15
inputattach linux-headers-3.0.0-15-generic
insserv linux-headers-generic
install-info linux-image-3.0.0-14-generic
intltool-debian linux-image-3.0.0-15-generic
iproute linux-image-generic
iptables linux-libc-dev
iputils-arping linux-sound-base
iputils-ping lmodern
iputils-tracepath locales
irqbalance lockfile-progs
isc-dhcp-client login
isc-dhcp-common logrotate
iso-codes lp-solve
java-common lsb-base
jockey-common lsb-release
jockey-gtk lsdvd
kbd lshw
kerneloops-daemon lsof
keyboard-configuration ltrace
klibc-utils luatex
lacheck m4
language-pack-en make
language-pack-en-base makedev
language-pack-gnome-en man-db
language-pack-gnome-en-base manpages
language-selector-common manpages-dev
laptop-detect mawk
latex-beamer media-player-info
latex-xcolor medibuntu-keyring
launchpad-integration memtest86+
less mencoder
lftp mesa-utils
lib32asound2 metacity
lib32bz2-1.0 metacity-common
lib32ffi6 mime-support
lib32gcc1 min12xxw
lib32ncurses5 mlocate
lib32ncursesw5 module-init-tools
lib32nss-mdns mongodb
lib32stdc++6 mongodb-clients
lib32tinfo5 mongodb-dev
lib32z1 mongodb-server
liba52-0.7.4 mount
libaa1 mountall
libaccess-bridge-java mousetweaks
libaccess-bridge-java-jni mpi-default-bin
libaccountsservice0 mpi-default-dev
libacl1 mplayer
libalgorithm-diff-perl mscompress
libalgorithm-diff-xs-perl mtools
libalgorithm-merge-perl mtr-tiny
libamd2.2.0 multiarch-support
libappindicator1 mutter-common
libappindicator3-1 myspell-en-au
libapr1 myspell-en-gb
libaprutil1 myspell-en-za
libaprutil1-dbd-sqlite3 mysql-common
libaprutil1-ldap mythes-en-us
libapt-inst1.3 nautilus
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libmms0 xserver-xorg
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libmodplug1 xserver-xorg-input-all
libmount1 xserver-xorg-input-evdev
libmozjs185-1.0 xserver-xorg-input-mouse
libmp3lame0 xserver-xorg-input-synaptics
libmpc2 xserver-xorg-input-vmmouse
libmpcdec6 xserver-xorg-input-wacom
libmpeg2-4 xserver-xorg-video-ati
libmpfr4 xserver-xorg-video-fbdev
libmtdev1 xserver-xorg-video-intel
libmtp9 xserver-xorg-video-mach64
libmtp-common xserver-xorg-video-neomagic
libmtp-runtime xserver-xorg-video-nouveau
libmusicbrainz4c2a xserver-xorg-video-r128
libmutter0 xserver-xorg-video-radeon
libmysqlclient16 xserver-xorg-video-sisusb
libmythes-1.2-0 xserver-xorg-video-vesa
libnatpmp1 xserver-xorg-video-vmware
libnautilus-extension1 xterm
libncurses5 xtrans-dev
libncurses5-dev x-ttcidfont-conf
libncursesw5 xul-ext-ubufox
libneon27-gnutls xz-utils
libnet-http-perl yelp
libnetpbm10 yelp-xsl
libnet-ssleay-perl zeitgeist
libnewt0.52 zeitgeist-core
libnfnetlink0 zeitgeist-datahub
libnice10 zeitgeist-extension-fts
libnih1 zenity
libnih-dbus1 zenity-common
libnl3 zile
libnm-glib4 zip
libnm-glib-vpn1 zlib1g
libnm-gtk0 zlib1g-dev
libnm-gtk-common
~ $
^ permalink raw reply [flat|nested] 13+ messages in thread* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 17:39 ` Chong Yidong
@ 2012-02-17 18:27 ` Eli Zaretskii
2012-02-18 2:28 ` Chong Yidong
0 siblings, 1 reply; 13+ messages in thread
From: Eli Zaretskii @ 2012-02-17 18:27 UTC (permalink / raw)
To: Chong Yidong; +Cc: 10835
> From: Chong Yidong <cyd@gnu.org>
> Cc: 10835@debbugs.gnu.org
> Date: Sat, 18 Feb 2012 01:39:23 +0800
>
> Here are the line numbers at which the printf is triggered (and how many
> times consecutively they get triggered, in parentheses):
Thanks. This means redisplay is invoked every 90 lines,
approximately, which is even less than in my case (I see a cycle of
redisplay every 40-50 lines of inserted input). The plot thickens...
What does "time ls /usr/share/doc" say, when you run it from the shell
buffer? What are the times it reports, and are they approximately the
same in each of the 4 invocations?
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-17 18:27 ` Eli Zaretskii
@ 2012-02-18 2:28 ` Chong Yidong
2012-02-18 3:37 ` Chong Yidong
2012-02-18 8:27 ` Eli Zaretskii
0 siblings, 2 replies; 13+ messages in thread
From: Chong Yidong @ 2012-02-18 2:28 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 10835
I just noticed that when I do `ls --color=no' rather than just `ls',
insertion and scrolling are very fast. The sluggishness only appears
when ls color highlighting is enabled. So the inefficiency of
ansi-color.el, and its use of overlays, seems to play a role.
Eli Zaretskii <eliz@gnu.org> writes:
> What does "time ls /usr/share/doc" say, when you run it from the shell
> buffer? What are the times it reports, and are they approximately the
> same in each of the 4 invocations?
Times are below. Another observation: with `time ls /usr/share/doc'
(which does use color highlighting), scrolling through the Shell buffer
is no longer sluggish. I think the output of `time' helps by providing
a paragraph break.
If I do plain `ls' (no `time'), then go back and edit the Shell buffer
manually by adding a C-q C-j line break after each prompt, that also
makes the scrolling sluggishness go away.
In xterm (speed is the same after repeated invocations):
real 0m0.148s
user 0m0.008s
sys 0m0.020s
In xterm, with --color=no:
real 0m0.039s
user 0m0.004s
sys 0m0.008s
In the Emacs 23 shell buffer, on the first invocation:
real 0m0.378s
user 0m0.008s
sys 0m0.008s
In the Emacs 24 shell buffer, on the first invocation:
real 0m0.866s
user 0m0.008s
sys 0m0.004s
In the Emacs 24 shell buffer, after 10 invocations:
real 0m1.969s
user 0m0.008s
sys 0m0.004s
In the Emacs 24 shell buffer, with --color=no:
real 0m0.296s
user 0m0.000s
sys 0m0.008s
In the Emacs 24 shell buffer, with --color=no, after 10 invocations:
real 0m0.280s
user 0m0.004s
sys 0m0.012s
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-18 2:28 ` Chong Yidong
@ 2012-02-18 3:37 ` Chong Yidong
2012-02-18 8:49 ` Eli Zaretskii
2012-02-18 8:27 ` Eli Zaretskii
1 sibling, 1 reply; 13+ messages in thread
From: Chong Yidong @ 2012-02-18 3:37 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 10835
Chong Yidong <cyd@gnu.org> writes:
> I just noticed that when I do `ls --color=no' rather than just `ls',
> insertion and scrolling are very fast. The sluggishness only appears
> when ls color highlighting is enabled. So the inefficiency of
> ansi-color.el, and its use of overlays, seems to play a role.
I just confirmed that the sluggishness goes away if I change
ansi-color.el to make it use text properties. Wish I'd remembered to do
that before the pretest began.
Roughly what is happening, I think, is that when overlays are heavily
used and there are no paragraph breaks (e.g. from the `time' output),
the bidi code does enough the additional overlay lookups to produce a
noticeable slowdown.
I'm not sure what's the best fix right now, though.
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-18 3:37 ` Chong Yidong
@ 2012-02-18 8:49 ` Eli Zaretskii
2012-02-18 14:14 ` Eli Zaretskii
2012-02-19 14:07 ` Chong Yidong
0 siblings, 2 replies; 13+ messages in thread
From: Eli Zaretskii @ 2012-02-18 8:49 UTC (permalink / raw)
To: Chong Yidong; +Cc: 10835
> From: Chong Yidong <cyd@gnu.org>
> Cc: 10835@debbugs.gnu.org
> Date: Sat, 18 Feb 2012 11:37:33 +0800
>
> Chong Yidong <cyd@gnu.org> writes:
>
> > I just noticed that when I do `ls --color=no' rather than just `ls',
> > insertion and scrolling are very fast. The sluggishness only appears
> > when ls color highlighting is enabled. So the inefficiency of
> > ansi-color.el, and its use of overlays, seems to play a role.
>
> I just confirmed that the sluggishness goes away if I change
> ansi-color.el to make it use text properties.
That figures. bidi.c needs to look up display properties and overlays
with display strings, in order to DTRT with their display (they are
treated as a single neutral character). So having lots of overlays
slows down redisplay a bit more.
> Wish I'd remembered to do that before the pretest began.
If this is a grave problem, we can still do it now, I think. Or we
could use a band-aid, see below.
> Roughly what is happening, I think, is that when overlays are heavily
> used and there are no paragraph breaks (e.g. from the `time' output),
> the bidi code does enough the additional overlay lookups to produce a
> noticeable slowdown.
Yes, the overlays together with the long search for paragraph
beginning probably push the user experience from slightly below the
annoyance threshold to just above it.
> I'm not sure what's the best fix right now, though.
How about setting bidi-paragraph-direction in comint buffers to
left-to-right when the locale indicates that use of bidirectional
scripts is unlikely? We could use locale-language-names and an
additional small database of languages that need bidi, to make that
decision. WDYT?
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-18 8:49 ` Eli Zaretskii
@ 2012-02-18 14:14 ` Eli Zaretskii
2012-02-19 14:07 ` Chong Yidong
1 sibling, 0 replies; 13+ messages in thread
From: Eli Zaretskii @ 2012-02-18 14:14 UTC (permalink / raw)
To: cyd; +Cc: 10835
> Date: Sat, 18 Feb 2012 10:49:19 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 10835@debbugs.gnu.org
>
> How about setting bidi-paragraph-direction in comint buffers to
> left-to-right when the locale indicates that use of bidirectional
> scripts is unlikely? We could use locale-language-names and an
> additional small database of languages that need bidi, to make that
> decision. WDYT?
Actually, it's probably better to go directly from the locale, since
locale-language-names doesn't really give the names of languages, it
gives the names of language environments, which can be totally
different.
I see only several locales that will need to dynamically determine
paragraph direction in comint buffers. Those are locales matching the
following regular expressions:
\`ar_.*
\`fa_.*
\`he_.*
\`iw_.*
\`ur_.*
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-18 8:49 ` Eli Zaretskii
2012-02-18 14:14 ` Eli Zaretskii
@ 2012-02-19 14:07 ` Chong Yidong
1 sibling, 0 replies; 13+ messages in thread
From: Chong Yidong @ 2012-02-19 14:07 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 10835
Eli Zaretskii <eliz@gnu.org> writes:
> Yes, the overlays together with the long search for paragraph
> beginning probably push the user experience from slightly below the
> annoyance threshold to just above it.
> ...
> How about setting bidi-paragraph-direction in comint buffers to
> left-to-right when the locale indicates that use of bidirectional
> scripts is unlikely? We could use locale-language-names and an
> additional small database of languages that need bidi, to make that
> decision. WDYT?
I'm not keen on bolting on this additional complexity.
I don't see any better way out, so we might as well take the risk and
switch to using text properties for color escape highlighting. I just
committed a patch to do that, limiting the change to Shell mode and
leaving the other users of ansi-color.el unaffected (and still using
overlays).
Thanks for helping with this bug. Hopefully the fix won't turn up any
problems...
^ permalink raw reply [flat|nested] 13+ messages in thread
* bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode
2012-02-18 2:28 ` Chong Yidong
2012-02-18 3:37 ` Chong Yidong
@ 2012-02-18 8:27 ` Eli Zaretskii
1 sibling, 0 replies; 13+ messages in thread
From: Eli Zaretskii @ 2012-02-18 8:27 UTC (permalink / raw)
To: Chong Yidong; +Cc: 10835
> From: Chong Yidong <cyd@gnu.org>
> Cc: 10835@debbugs.gnu.org
> Date: Sat, 18 Feb 2012 10:28:12 +0800
>
> Times are below. Another observation: with `time ls /usr/share/doc'
> (which does use color highlighting), scrolling through the Shell buffer
> is no longer sluggish. I think the output of `time' helps by providing
> a paragraph break.
Of course. That makes each 2000-line output a separate paragraph, as
far as bidi is concerned. So you never get to the 7500-line limit of
searching for paragraph beginning.
When I tried to reproduce the problem on Windows, I manually edited
away these empty lines (which are inserted in my case because the
shell prompt on Windows always starts with a newline).
> If I do plain `ls' (no `time'), then go back and edit the Shell buffer
> manually by adding a C-q C-j line break after each prompt, that also
> makes the scrolling sluggishness go away.
Of course, for the same reasons.
> In the Emacs 24 shell buffer, after 10 invocations:
>
> real 0m1.969s
> user 0m0.008s
> sys 0m0.004s
Is this with the empty lines between invocations, or without?
If the former, do the 2 seconds match your impression of sluggishness,
i.e., do you indeed see Emacs take about 2 sec to insert the 10th
listing into the shell buffer? Or does the insertion take much
longer? (Timing with second-resolution can be done by just looking at
your wallclock time.)
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2012-02-19 14:07 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-02-17 5:41 bug#10835: 24.0.93; bidi-paragraph-direction slows down Shell mode Chong Yidong
2012-02-17 5:48 ` Chong Yidong
2012-02-17 8:21 ` Andreas Schwab
2012-02-17 13:42 ` Chong Yidong
2012-02-17 16:08 ` Eli Zaretskii
2012-02-17 17:39 ` Chong Yidong
2012-02-17 18:27 ` Eli Zaretskii
2012-02-18 2:28 ` Chong Yidong
2012-02-18 3:37 ` Chong Yidong
2012-02-18 8:49 ` Eli Zaretskii
2012-02-18 14:14 ` Eli Zaretskii
2012-02-19 14:07 ` Chong Yidong
2012-02-18 8:27 ` Eli Zaretskii
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