GNU bug report logs - #16458
24.3.50; Slow update of region higlight when Follow mode is used

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Package: emacs; Reported by: Anders Lindgren <andlind@HIDDEN>; dated Wed, 15 Jan 2014 21:14:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Subject: 24.3.50; Slow update of region higlight when Follow mode is used
From: Anders Lindgren <andlind@HIDDEN>
To: bug-gnu-emacs@HIDDEN
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--e89a8f234b55ab63c904f008c5cf
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From: Anders Lindgren <anders@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 24.3.50; Slow update of region higlight when Follow mode is used
--text follows this line--

When Follow mode is enabled, the region highlight does not update as fast
as it normally does.

Steps to repeat:

    emacs -Q
    C-h t
    M-x follow-delete-other-windows-and-split RET
    C-SPC
    Press and hold C-n,  release it when the cursor is halfway down the
window.

    Here, the region highlight does not follow the cursor, it appears a
second or so after the key was released.

    Just as a reference, do the same without follow-mode:

    M-x follow-mode RET
    Press and hold C-n and run the cursor to the end of the window.

    This time the region highlight follows the cursor as it is moved around.

It's hard to tell when this problem was introduced, as both cursor movement
and region highlight first worked, then both were broken (slow), then
cursor movement were corrected.

    -- Anders Lindgren


In GNU Emacs 24.3.50.3 (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00)
 of 2014-01-14 on macpro.lan
Repository revision: 116025
agustin.martin@HIDDEN
Windowing system distributor `Apple', version 10.3.1265
Configured using:
 `configure --with-ns'

Important settings:
  value of $LC_CTYPE: UTF-8
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  follow-mode: t
  tooltip-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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-h t C-SPC <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <escape>
x f o l l o w - m o d e <return> <down> <down> <down>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <escape> x f o l l o w - d e <tab> <return>
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up>
<up> <down> <down> <down> <down> <down> <down> <down>
<down> <down> <down> <down> <escape> x <up> <up> <return>
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up>
<down> <S-down> <S-down> <S-down> <S-down> <S-down>
<S-down> <S-down> <S-down> <S-down> <S-down> <S-down>
<S-up> <S-up> <S-up> <S-up> <S-up> <S-up> <S-up> <S-up>
<S-up> <S-up> <S-up> <S-up> <S-up> <S-up> <S-up> <up>
<up> <up> C-SPC <down> <down> <down> <down> <down>
<down> <down> <down> <down> <down> <down> C-SPC <up>
<up> <up> <up> <up> <up> <up> <up> <up> <up> <escape>
x f o l l o w - m o <tab> <return> C-SPC <down> <down>
<down> <down> <down> <down> <down> <down> <down> <down>
<down> <s-escape> C-x 1 <escape> x r e p o r t - e
m <tab> <return>

Recent messages:
Preparing tutorial ...
Mark set
Follow mode enabled
You can run the command `follow-delete-other-windows-and-split' with C-c . 1
Follow mode disabled
Mark set [3 times]
Follow mode enabled
Mark set
<s-escape> is undefined
M-o f is undefined

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec 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 follow tutorial help-mode easymenu
time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel ns-win tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment lisp-mode prog-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 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 make-network-process cocoa ns multi-tty emacs)

--e89a8f234b55ab63c904f008c5cf
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>From: Anders Lindgren &lt;anders@HIDDEN&gt;</div>=
<div>To: <a href=3D"mailto:bug-gnu-emacs@HIDDEN">bug-gnu-emacs@HIDDEN</a>=
</div><div>Subject: 24.3.50; Slow update of region higlight when Follow mod=
e is used</div>
<div>--text follows this line--</div><div><br></div><div>When Follow mode i=
s enabled, the region highlight does not update as fast as it normally does=
.</div><div><br></div><div>Steps to repeat:</div><div><br></div><div>=A0 =
=A0 emacs -Q</div>
<div>=A0 =A0 C-h t</div><div>=A0 =A0 M-x=A0follow-delete-other-windows-and-=
split RET</div><div>=A0 =A0 C-SPC</div><div>=A0 =A0 Press and hold C-n, =A0=
release it when the cursor is halfway down the window.</div><div><br></div>=
<div>=A0 =A0 Here, the region highlight does not follow the cursor, it appe=
ars a second or so after the key was released.</div>
<div><br></div><div>=A0 =A0 Just as a reference, do the same without follow=
-mode:</div><div><br></div><div>=A0 =A0 M-x follow-mode RET</div><div>=A0 =
=A0 Press and hold C-n and run the cursor to the end of the window.</div><d=
iv><br></div>
<div>=A0 =A0 This time the region highlight follows the cursor as it is mov=
ed around.</div><div><br></div><div>It&#39;s hard to tell when this problem=
 was introduced, as both cursor movement and region highlight first worked,=
 then both were broken (slow), then cursor movement were corrected.</div>
<div><br></div><div>=A0 =A0 -- Anders Lindgren</div><div><br></div><div><br=
></div><div>In GNU Emacs 24.3.50.3 (x86_64-apple-darwin13.0.0, NS apple-app=
kit-1265.00)</div><div>=A0of 2014-01-14 on macpro.lan</div><div>Repository =
revision: 116025 agustin.martin@HIDDEN=
t3</div>
<div>Windowing system distributor `Apple&#39;, version 10.3.1265</div><div>=
Configured using:</div><div>=A0`configure --with-ns&#39;</div><div><br></di=
v><div>Important settings:</div><div>=A0 value of $LC_CTYPE: UTF-8</div><di=
v>
=A0 locale-coding-system: utf-8-unix</div><div><br></div><div>Major mode: F=
undamental</div><div><br></div><div>Minor modes in effect:</div><div>=A0 fo=
llow-mode: t</div><div>=A0 tooltip-mode: t</div><div>=A0 electric-indent-mo=
de: t</div>
<div>=A0 mouse-wheel-mode: t</div><div>=A0 tool-bar-mode: t</div><div>=A0 m=
enu-bar-mode: t</div><div>=A0 file-name-shadow-mode: t</div><div>=A0 global=
-font-lock-mode: t</div><div>=A0 blink-cursor-mode: t</div><div>=A0 auto-co=
mposition-mode: t</div>
<div>=A0 auto-encryption-mode: t</div><div>=A0 auto-compression-mode: t</di=
v><div>=A0 line-number-mode: t</div><div>=A0 transient-mark-mode: t</div><d=
iv><br></div><div>Recent input:</div><div>C-h t C-SPC &lt;down&gt; &lt;down=
&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt;=A0</div>
<div>&lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;d=
own&gt; &lt;down&gt; &lt;escape&gt;=A0</div><div>x f o l l o w - m o d e &l=
t;return&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt;=A0</div><div>&lt;down&g=
t; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;dow=
n&gt; &lt;down&gt;=A0</div>
<div>&lt;down&gt; &lt;escape&gt; x f o l l o w - d e &lt;tab&gt; &lt;return=
&gt;=A0</div><div>&lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &l=
t;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt;=A0</div><di=
v>
&lt;up&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt;=
 &lt;down&gt; &lt;down&gt;=A0</div><div>&lt;down&gt; &lt;down&gt; &lt;down&=
gt; &lt;down&gt; &lt;escape&gt; x &lt;up&gt; &lt;up&gt; &lt;return&gt;=A0</=
div>
<div>&lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;=
up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt;=A0</div><div>&lt;down&gt=
; &lt;S-down&gt; &lt;S-down&gt; &lt;S-down&gt; &lt;S-down&gt; &lt;S-down&gt=
;=A0</div>
<div>&lt;S-down&gt; &lt;S-down&gt; &lt;S-down&gt; &lt;S-down&gt; &lt;S-down=
&gt; &lt;S-down&gt;=A0</div><div>&lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt=
;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt;=A0</div><div>
&lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt;S-up&gt; &lt;S-up&g=
t; &lt;S-up&gt; &lt;up&gt;=A0</div><div>&lt;up&gt; &lt;up&gt; C-SPC &lt;dow=
n&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt;=A0</div><div>&lt;=
down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; C=
-SPC &lt;up&gt;=A0</div>
<div>&lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;up&gt; &lt;=
up&gt; &lt;up&gt; &lt;up&gt; &lt;escape&gt;=A0</div><div>x f o l l o w - m =
o &lt;tab&gt; &lt;return&gt; C-SPC &lt;down&gt; &lt;down&gt;=A0</div><div>&=
lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt; &lt;down&gt=
; &lt;down&gt; &lt;down&gt;=A0</div>
<div>&lt;down&gt; &lt;s-escape&gt; C-x 1 &lt;escape&gt; x r e p o r t - e=
=A0</div><div>m &lt;tab&gt; &lt;return&gt;</div><div><br></div><div>Recent =
messages:</div><div>Preparing tutorial ...</div><div>Mark set</div><div>Fol=
low mode enabled</div>
<div>You can run the command `follow-delete-other-windows-and-split&#39; wi=
th C-c . 1</div><div>Follow mode disabled</div><div>Mark set [3 times]</div=
><div>Follow mode enabled</div><div>Mark set</div><div>&lt;s-escape&gt; is =
undefined</div>
<div>M-o f is undefined</div><div><br></div><div>Load-path shadows:</div><d=
iv>None found.</div><div><br></div><div>Features:</div><div>(shadow sort gn=
us-util mail-extr emacsbug message format-spec rfc822 mml</div><div>mml-sec=
 mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev</div>
<div>gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util</div>=
<div>help-fns mail-prsvr mail-utils follow tutorial help-mode easymenu</div=
><div>time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-ty=
pe</div>
<div>mwheel ns-win tool-bar dnd fontset image regexp-opt fringe</div><div>t=
abulated-list newcomment lisp-mode prog-mode register page menu-bar</div><d=
iv>rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax</div=
>
<div>facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese=
</div><div>tibetan thai tai-viet lao korean japanese hebrew greek romanian =
slovak</div><div>czech european ethiopic indian cyrillic chinese case-table=
 epa-hook</div>
<div>jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button</d=
iv><div>faces cus-face macroexp files text-properties overlay sha1 md5 base=
64</div><div>format env code-pages mule custom widget hashtable-print-reada=
ble</div>
<div>backquote make-network-process cocoa ns multi-tty emacs)</div><div><br=
></div></div>

--e89a8f234b55ab63c904f008c5cf--




Acknowledgement sent to Anders Lindgren <andlind@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#16458; Package emacs. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Fri, 31 Oct 2014 17:00:04 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.