From: Eli Zaretskii <eliz@gnu.org>
To: Evgeny Zajcev <lg.zevlg@gmail.com>
Cc: 39133@debbugs.gnu.org
Subject: bug#39133: 28.0.50; Emacs slowdown on special char
Date: Tue, 14 Jan 2020 17:26:45 +0200 [thread overview]
Message-ID: <83lfqa5aa2.fsf@gnu.org> (raw)
In-Reply-To: <CAO=W_ZrSPweeZ+kKUruMnuHuaJD3KqLMSKr53qoGe4X5-f8LeA@mail.gmail.com> (message from Evgeny Zajcev on Tue, 14 Jan 2020 16:21:23 +0300)
> From: Evgeny Zajcev <lg.zevlg@gmail.com>
> Date: Tue, 14 Jan 2020 16:21:23 +0300
>
> I'm experiencing extreme Emacs slowdown when VARIATION SELECTOR-16 char
> is used somewhere in Emacs buffer. For example, I just executed:
>
> (insert "a\xfe0f")
>
> in *scratch* buffer. Moving cursor (when this char is visible) become
> unbearable. Here is the results of cpu profiling:
>
> - command-execute 776 62%
> - call-interactively 776 62%
> - funcall-interactively 675 54%
> - previous-line 476 38%
> - line-move 476 38%
> - line-move-1 476 38%
> + vertical-motion 225 18%
Does it help to set inhibit-compacting-font-caches non-nil?
> As I remember I did not experienced something similar in Emacs 26/27
I don't think Emacs < 27 supported variation selectors, did it?
next prev parent reply other threads:[~2020-01-14 15:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-14 13:21 bug#39133: 28.0.50; Emacs slowdown on special char Evgeny Zajcev
2020-01-14 15:26 ` Eli Zaretskii [this message]
2020-01-14 16:24 ` Robert Pluim
2020-01-15 4:26 ` YAMAMOTO Mitsuharu
2020-01-15 8:25 ` Robert Pluim
2020-01-15 10:47 ` Evgeny Zajcev
2020-01-15 16:19 ` Eli Zaretskii
2020-01-24 10:13 ` Robert Pluim
2020-01-24 10:22 ` Eli Zaretskii
2020-01-24 13:09 ` Robert Pluim
2020-01-24 13:40 ` Eli Zaretskii
2020-01-24 13:50 ` Robert Pluim
2020-01-24 15:41 ` Robert Pluim
2020-01-24 15:52 ` Eli Zaretskii
2020-03-02 7:40 ` Robert Pluim
2020-03-02 8:49 ` Eli Zaretskii
2020-03-02 9:25 ` Robert Pluim
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