GNU bug report logs - #77620
thingatpt can be incredibly slow in python-mode buffers

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Package: emacs;

Reported by: JD Smith <jdtsmith <at> gmail.com>

Date: Mon, 7 Apr 2025 21:50:02 UTC

Severity: normal

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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

From: JD Smith <jdtsmith <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: thingatpt can be incredibly slow in python-mode buffers
Date: Mon, 7 Apr 2025 17:48:49 -0400

[Message part 1 (text/plain, inline)]
As discussed in Bug#77588:

> (/ (car (benchmark-run 10 (thing-at-point 'sexp))) 10)


Try this test at the start of L8817 in this file (no eglot needed; either python-mode or python-ts-mode is fine, as both show the same issue):

https://raw.githubusercontent.com/matplotlib/matplotlib/refs/heads/main/lib/matplotlib/axes/_axes.py
https://raw.githubusercontent.com/matplotlib/matplotlib/refs/heads/main/lib/matplotlib/axes/_axes.py
_axes
Text Document · 353 KB

In #77588 this was shown to lead to long intermittent pauses with eglot in large python buffers, but the issue is more general for any packages using thingatpt in python buffers.
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This bug report was last modified 84 days ago.

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