GNU bug report logs - #37000
27.0.50; gc and laggy Emacs

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Alex Branham <alex.branham <at> gmail.com>
Subject: bug#37000: closed (Re: bug#37000: 27.0.50; gc and laggy Emacs)
Date: Thu, 27 Aug 2020 20:58:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#37000: 27.0.50; gc and laggy Emacs

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 37000 <at> debbugs.gnu.org.

-- 
37000: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37000
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Alex Branham <alex.branham <at> gmail.com>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 37000-done <at> debbugs.gnu.org
Subject: Re: bug#37000: 27.0.50; gc and laggy Emacs
Date: Thu, 27 Aug 2020 16:57:33 -0400

On Tue 25 Aug 2020 at 17:15, Stefan Kangas <stefan <at> marxist.se> wrote:

> Alex Branham <alex.branham <at> gmail.com> writes:
>
>> On Sat 10 Aug 2019 at 19:50, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>
>>>> From: Alex Branham <alex.branham <at> gmail.com>
>>>> Date: Sat, 10 Aug 2019 11:27:29 -0500
>>>>
>>>> Recently I've noticed Emacs sometimes getting _very_ laggy, as in
>>>> taking up to a half-second to display the a single character that
>>>> I type. M-x profiler-start suggests that garbage-collection is
>>>> taking up too much time (see below my signature for example
>>>> output). gc-cons-percentage and gc-cons-threshold are at their
>>>> default values. I can't figure out how to reproduce this reliably,
>>>> but running M-x relint-directory on the Emacs source tree seems to
>>>> do a decent job triggering it. My Emacs is built from commit
>>>> 4ce9c6d0b58bd77bc811d6c1c5caf955a5a0be2f (~ 4 days ago) of the
>>>> master branch. How can I go about tracking this down?
>>>
>>> Trying to bisect to find the offending commit would be one way.
>>
>> Thanks. I noticed there's some activity around gc on master currently.
>> I'll wait for that to pass before trying this.
>>
>> I'll note though that I don't see this issue on 26.2.
>
> (That was one year ago.)
>
> Any updates here?

No, but the problem seems to have gone away so I'll close this bug.

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From: Alex Branham <alex.branham <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; gc and laggy Emacs
Date: Sat, 10 Aug 2019 11:27:29 -0500

Hello -

Recently I've noticed Emacs sometimes getting _very_ laggy, as in 
taking up to a half-second to display the a single character that 
I type. M-x profiler-start suggests that garbage-collection is 
taking up too much time (see below my signature for example 
output). gc-cons-percentage and gc-cons-threshold are at their 
default values. I can't figure out how to reproduce this reliably, 
but running M-x relint-directory on the Emacs source tree seems to 
do a decent job triggering it. My Emacs is built from commit 
4ce9c6d0b58bd77bc811d6c1c5caf955a5a0be2f (~ 4 days ago) of the 
master branch. How can I go about tracking this down?

Thanks,
Alex

- ... 
 51442  74%
  Automatic GC 
  51440  74%
+ winum-select-window-1 
1   0%
+ #<compiled 0x443aa1> 
1   0%
+ command-execute 
11973  17%
+ timer-event-handler 
4837   6%
+ flyspell-post-command-hook 
536   0%
+ redisplay_internal (C function) 
262   0%
+ xcb:-connection-filter 
60   0%
+ internal-timer-start-idle 
38   0%
 mu4e~proc-filter 
 11   0%
+ winner-save-old-configurations 
6   0%
+ eldoc-pre-command-refresh-echo-area 
4   0%
+ #<compiled 0x1ffab289c50b> 
3   0%
+ undo-auto--add-boundary 
1   0%
 exwm-layout--on-echo-area-change 
 1   0%
+ mu4e~update-sentinel-func 
1   0%
+ gui-set-selection 
1   0%
+ #<compiled 0x10b7815> 
1   0%



In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.24.10)
Windowing system distributor 'The X.Org Foundation', version 
11.0.12004000
System Description: NixOS 19.03.173251.56d94c8c69f (Koi)

Configured using:
'configure
--prefix=/nix/store/zwkzz533szjmra431czdyr39hibfzxni-emacs-27.0.50
--disable-build-details --with-modules --with-x-toolkit=gtk3 
--with-xft
CFLAGS=-DMAC_OS_X_VERSION_MAX_ALLOWED=101200'
Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND DBUS GSETTINGS GLIB NOTIFY 
INOTIFY
LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT 
ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD 
JSON
PDUMPER GMP
Important settings:
 value of $LANG: en_US.UTF-8
 locale-coding-system: utf-8-unix

Memory information:
((conses 16 678039 134311)
(symbols 48 88978 26)
(strings 32 245611 6884)
(string-bytes 1 7634214)
(vectors 16 142349)
(vector-slots 8 3015732 58606)
(floats 8 741 448)
(intervals 56 9225 1373)
(buffers 992 1263))

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