bug#63842: 30.0.50; Slow 'gnus-summary-refer-thread'

[Manuel Giraud]

Hi,

Since sometimes now, in Gnus summary, calling 'A T'
(gnus-summary-refer-thread) is really slow (30 seconds to 1 minute) and
it was instantaneous before.  I have bisected it to the following patch:

bf986c1faf53f3abd260f72cb36d9143afac353d is the first bad commit
commit bf986c1faf53f3abd260f72cb36d9143afac353d
Author: Andrew G Cohen <cohen@andy.bu.edu>
Date:   Tue Nov 22 15:39:01 2022 +0800
    Improve gnus thread-referral
    
    Allow thread referral to use search whenever possible, displaying the
    results in the current summary buffer if possible and a new nnselect
    buffer if not.
    
    * lisp/gnus/nnimap.el (nnimap-request-thread): Obsolete function.
    * lisp/gnus/gnus-search.el (gnus-search-thread): Allow detailed
    specification of how/where to search. Add found articles to the
    current summary buffer if possible, or create a new ephemeral nnselect
    group if not.
    * lisp/gnus/gnus-sum.el (gnus-refer-thread-use-search): Allow a list
    of servers and groups to search.
    (gnus-summary-refer-thread): Find thread-related articles by using a
    backend-specific method, gnus-search, or retrieving nearby headers in
    the current group.
    * lisp/gnus/nnselect.el (nnselect-search-thread): Obsolete function.
    (nnselect-request-thread): Allow thread referral from nnselect groups.
    * doc/misc/gnus.texi (Finding the Parent): Document changes to thread
    referral.


In GNU Emacs 30.0.50 (build 1, x86_64-unknown-openbsd7.3, cairo version
 1.17.8) of 2023-06-02 built on computer
Repository revision: bf986c1faf53f3abd260f72cb36d9143afac353d
Repository branch: HEAD
Windowing system distributor 'The X.Org Foundation', version 11.0.12101006
System Description: OpenBSD computer 7.3 GENERIC.MP#1125 amd64

Configured using:
 'configure --prefix=/home/manuel/emacs --bindir=/home/manuel/bin
 --with-x-toolkit=no --without-sound --without-compress-install
 CPPFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBXML2 MODULES NOTIFY KQUEUE OLDXMENU PDUMPER PNG RSVG
SQLITE3 THREADS TIFF TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
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  display-time-mode: t
  display-battery-mode: t
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  font-lock-mode: t
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  line-number-mode: t
  indent-tabs-mode: t
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  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/manuel/.emacs.d/elpa/ef-themes-1.0.2/theme-loaddefs hides 
/home/manuel/emacs/share/emacs/30.0.50/lisp/theme-loaddefs

Features:
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ef-themes-autoloads with-editor-autoloads compat-autoloads
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paredit-autoloads exwm-autoloads hyperbole-autoloads detached-autoloads
info package browse-url url url-proxy url-privacy url-expand url-methods
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theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind kqueue lcms2
dynamic-setting system-font-setting font-render-setting cairo xinput2 x
multi-tty make-network-process emacs)

Memory information:
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 (symbols 48 62657 9)
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 (vectors 16 189334)
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 (buffers 984 91))

-- 
Manuel Giraud