GNU bug report logs - #16688
24.3; slow select region on X over SSH

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ryo Furue <furue <at> hawaii.edu>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; slow select region on X over SSH
Date: Sat, 08 Feb 2014 01:56:47 -1000 (HST)

Dear emacs maintainers,

I run emacs on a remote Debian-testing server on X over SSH
from my local Mac OS X machine.  

I compared these two cases:

remote$ /usr/bin/emacs24 -q --eval '(+ 2 3)'
remote$ /usr/bin/emacs24 -q --eval '(setq select-active-regions nil)'

In the former case, once you press C-Spc (control-space), the emacs
text cursor moves only very slowly.  In the latter case, the text
cursor moves normally.  I repeated the two cases alternately for five
times or so and always got the same contrast.

My local X11 server is XQuartz 2.7.5 (xorg-server 1.14.4).
My local machine runs Mac OS X 10.6.8.

When I'm on my Debian server and invoke emacs24 locally,
I don't notice any slowness in cursor movement.

By the way, I used '(+ 2 3)' only because I wanted to go to the same
*scratch* buffer to select the same text and I don't know a no-op
function in Lisp.

Regards,

Ryo

In GNU Emacs 24.3.1 (i486-pc-linux-gnu, GTK+ Version 3.8.6)
 of 2013-12-22 on binet, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11404000
System Description:	Debian GNU/Linux testing (jessie)

Configured using:
 `configure '--build' 'i486-linux-gnu' '--build' 'i486-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var/lib' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 '--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/i386-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk3' '--with-toolkit-scroll-bars'
 'build_alias=i486-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
 'LDFLAGS=-Wl,-z,relro' 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

Important settings:
  value of $LANG: C.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  show-paren-mode: t
  global-hl-line-mode: t
  tooltip-mode: t
  mouse-wheel-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
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<escape> x e m a c s - b u g TAB r e TAB C-h C-h C-h 
C-h C-h C-h C-h C-h C-h C-h C-h C-h r e p o r t TAB 
<return>

Recent messages:
Loading /etc/emacs/site-start.d/50mew.el (source)...done
Loading /etc/emacs/site-start.d/50muse-el.el (source)...
Loading /usr/share/emacs24/site-lisp/muse-el/muse-autoloads.el (source)...done
Loading /etc/emacs/site-start.d/50muse-el.el (source)...done
Loading /etc/emacs/site-start.d/50python-docutils.el (source)...done
Loading /etc/emacs/site-start.d/50ruby1.8-elisp.el (source)...done
Loading /etc/emacs/site-start.d/50w3m-el.el (source)...done
Loading /etc/emacs/site-start.d/51debian-el.el (source)...done
`condition-case-no-debug' is an obsolete alias (as of 24.1); use `condition-case-unless-debug' instead. [2 times]
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
/usr/share/emacs/24.3/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs24/site-lisp/flim/hex-util hides /usr/share/emacs/24.3/lisp/hex-util
/usr/share/emacs24/site-lisp/flim/md4 hides /usr/share/emacs/24.3/lisp/md4
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.3/lisp/textmodes/rst
/usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/24.3/lisp/textmodes/flyspell
/usr/share/emacs24/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/24.3/lisp/textmodes/ispell
/usr/share/emacs24/site-lisp/ruby1.8-elisp/ruby-mode hides /usr/share/emacs/24.3/lisp/progmodes/ruby-mode
/usr/share/emacs24/site-lisp/flim/ntlm hides /usr/share/emacs/24.3/lisp/net/ntlm
/usr/share/emacs24/site-lisp/flim/hmac-md5 hides /usr/share/emacs/24.3/lisp/net/hmac-md5
/usr/share/emacs24/site-lisp/flim/hmac-def hides /usr/share/emacs/24.3/lisp/net/hmac-def
/usr/share/emacs24/site-lisp/flim/sasl hides /usr/share/emacs/24.3/lisp/net/sasl
/usr/share/emacs24/site-lisp/flim/sasl-digest hides /usr/share/emacs/24.3/lisp/net/sasl-digest
/usr/share/emacs24/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/24.3/lisp/net/sasl-ntlm
/usr/share/emacs24/site-lisp/flim/sasl-cram hides /usr/share/emacs/24.3/lisp/net/sasl-cram
~/lib/emacs/package hides /usr/share/emacs/24.3/lisp/emacs-lisp/package
/usr/share/emacs24/site-lisp/auctex/tex-jp hides /usr/share/emacs/site-lisp/auctex/tex-jp
/usr/share/emacs24/site-lisp/auctex/bib-cite hides /usr/share/emacs/site-lisp/auctex/bib-cite
/usr/share/emacs24/site-lisp/auctex/multi-prompt hides /usr/share/emacs/site-lisp/auctex/multi-prompt
/usr/share/emacs24/site-lisp/auctex/preview hides /usr/share/emacs/site-lisp/auctex/preview
/usr/share/emacs24/site-lisp/auctex/tex-bar hides /usr/share/emacs/site-lisp/auctex/tex-bar
/usr/share/emacs24/site-lisp/auctex/prv-emacs hides /usr/share/emacs/site-lisp/auctex/prv-emacs
/usr/share/emacs24/site-lisp/auctex/tex-info hides /usr/share/emacs/site-lisp/auctex/tex-info
/usr/share/emacs24/site-lisp/auctex/font-latex hides /usr/share/emacs/site-lisp/auctex/font-latex
/usr/share/emacs24/site-lisp/auctex/tex-font hides /usr/share/emacs/site-lisp/auctex/tex-font
/usr/share/emacs24/site-lisp/auctex/tex-style hides /usr/share/emacs/site-lisp/auctex/tex-style
/usr/share/emacs24/site-lisp/auctex/toolbar-x hides /usr/share/emacs/site-lisp/auctex/toolbar-x
/usr/share/emacs24/site-lisp/auctex/plain-tex hides /usr/share/emacs/site-lisp/auctex/plain-tex
/usr/share/emacs24/site-lisp/auctex/texmathp hides /usr/share/emacs/site-lisp/auctex/texmathp
/usr/share/emacs24/site-lisp/auctex/context hides /usr/share/emacs/site-lisp/auctex/context
/usr/share/emacs24/site-lisp/auctex/latex hides /usr/share/emacs/site-lisp/auctex/latex
/usr/share/emacs24/site-lisp/auctex/context-en hides /usr/share/emacs/site-lisp/auctex/context-en
/usr/share/emacs24/site-lisp/auctex/tex hides /usr/share/emacs/site-lisp/auctex/tex
/usr/share/emacs24/site-lisp/auctex/tex-mik hides /usr/share/emacs/site-lisp/auctex/tex-mik
/usr/share/emacs24/site-lisp/auctex/context-nl hides /usr/share/emacs/site-lisp/auctex/context-nl
/usr/share/emacs24/site-lisp/auctex/tex-buf hides /usr/share/emacs/site-lisp/auctex/tex-buf
/usr/share/emacs24/site-lisp/auctex/tex-fold hides /usr/share/emacs/site-lisp/auctex/tex-fold

Features:
(shadow pp flyspell ispell mew-varsx mew-unix mew-w3m w3m browse-url
doc-view jka-compr dired image-mode timezone w3m-hist w3m-fb
bookmark-w3m w3m-ems wid-edit w3m-ccl ccl w3m-favicon w3m-image
w3m-proc w3m-util mew-auth mew-config mew-imap2 mew-imap mew-nntp2
mew-nntp mew-pop mew-smtp mew-ssl mew-ssh mew-net mew-highlight
mew-sort mew-fib mew-ext mew-refile mew-demo mew-attach mew-draft
mew-message mew-thread mew-virtual mew-summary4 mew-summary3
mew-summary2 mew-summary mew-search mew-pick mew-passwd mew-scan
mew-syntax mew-bq mew-smime mew-pgp mew-header mew-exec mew-mark
mew-mime mew-edit mew-decode mew-encode mew-cache mew-minibuf
mew-complete mew-addrbook mew-local mew-vars3 mew-vars2 mew-vars
mew-env mew-mule3 mew-mule mew-gemacs mew-key mew-func mew-blvs
mew-const mew emacsbug message format-spec rfc822 mml easymenu mml-sec
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils mozc typopunct saveplace advice help-fns cl-lib
advice-preload paren hl-line package derived debian-el
debian-el-loaddefs w3m-load muse-autoloads haskell-mode-autoloads
edmacro kmacro emacs-goodies-el emacs-goodies-custom
emacs-goodies-loaddefs easy-mmode preview-latex tex-site auto-loads
time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win
x-dnd 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 dbusbind dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Message #8 received at 16688 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Ryo Furue <furue <at> hawaii.edu>
Cc: 16688 <at> debbugs.gnu.org
Subject: Re: bug#16688: 24.3; slow select region on X over SSH
Date: Fri, 04 Dec 2020 13:14:19 +0100

Ryo Furue <furue <at> hawaii.edu> writes:

> I run emacs on a remote Debian-testing server on X over SSH
> from my local Mac OS X machine.  
>
> I compared these two cases:
>
> remote$ /usr/bin/emacs24 -q --eval '(+ 2 3)'
> remote$ /usr/bin/emacs24 -q --eval '(setq select-active-regions nil)'
>
> In the former case, once you press C-Spc (control-space), the emacs
> text cursor moves only very slowly.  In the latter case, the text
> cursor moves normally.  I repeated the two cases alternately for five
> times or so and always got the same contrast.

I think this is to be expected -- in the former case, any changes to the
active region will set the primary selection, and (if I remember how
this works in X; I may be misremembering) this means that Emacs has to
communicate this to the X server -- which takes time, depending on how
fast your connection is.

So I don't think there's a bug here, and I'm closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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