From: Eli Zaretskii <eliz@gnu.org>
To: Yuan Fu <casouri@gmail.com>
Cc: 60953@debbugs.gnu.org, dgutov@yandex.ru
Subject: bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient
Date: Thu, 26 Jan 2023 10:10:17 +0200 [thread overview]
Message-ID: <83pmb1emxi.fsf@gnu.org> (raw)
In-Reply-To: <5026D975-983F-4D18-8690-BE139C92825D@gmail.com> (message from Yuan Fu on Wed, 25 Jan 2023 23:17:25 -0800)
> From: Yuan Fu <casouri@gmail.com>
> Date: Wed, 25 Jan 2023 23:17:25 -0800
> Cc: Dmitry Gutov <dgutov@yandex.ru>,
> 60953@debbugs.gnu.org
>
> >> Switching to using :pred with function (like I did in commit
> >> d94dc606a0934) which still uses buffer-substring inside is significantly
> >> faster.
> >
> > If the performance issue is fixed, then the only aspect that we should
> > perhaps try to improve is consing. Consing a string each time you
> > need to fontify increases the GC pressure, so if there's a good way of
> > avoiding that without performance degradation, we should take it. Is
> > it possible to use your :pred technique in a way that doesn't need to
> > produce strings from buffer text?
>
> Why is :pred more performant though? They just use string-match-p. If anything, the :pred predicates should be more expensive, since they execute lisp functions and conses tree-sitter nodes into lisp objects.
Yes, exactly my thoughts.
Perhaps Dmitry could present comparison of profiles from perf which
would allow us to understand the reason(s)?
next prev parent reply other threads:[~2023-01-26 8:10 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 3:53 bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient Dmitry Gutov
2023-01-24 4:04 ` Dmitry Gutov
2023-01-25 3:13 ` Yuan Fu
2023-01-25 3:48 ` Dmitry Gutov
2023-01-25 12:49 ` Eli Zaretskii
2023-01-25 23:21 ` Dmitry Gutov
2023-01-26 6:50 ` Eli Zaretskii
2023-01-26 7:17 ` Yuan Fu
2023-01-26 8:10 ` Eli Zaretskii [this message]
2023-01-26 17:15 ` Dmitry Gutov
2023-01-26 18:24 ` Eli Zaretskii
2023-01-26 19:35 ` Dmitry Gutov
2023-01-26 20:01 ` Eli Zaretskii
2023-01-26 21:26 ` Dmitry Gutov
2023-01-30 0:49 ` Dmitry Gutov
2023-01-30 14:06 ` Eli Zaretskii
2023-01-30 14:47 ` Dmitry Gutov
2023-01-30 15:08 ` Eli Zaretskii
2023-01-30 17:15 ` Dmitry Gutov
2023-01-30 17:49 ` Eli Zaretskii
2023-01-30 18:20 ` Dmitry Gutov
2023-01-30 18:42 ` Eli Zaretskii
2023-01-30 19:01 ` Dmitry Gutov
2023-01-30 19:05 ` Eli Zaretskii
2023-01-30 19:58 ` Dmitry Gutov
2023-01-30 23:57 ` Yuan Fu
2023-01-31 0:44 ` Dmitry Gutov
2023-01-31 3:23 ` Eli Zaretskii
2023-01-31 18:16 ` Dmitry Gutov
2023-02-01 2:39 ` Dmitry Gutov
2023-02-01 13:39 ` Eli Zaretskii
2023-02-01 15:13 ` Dmitry Gutov
2023-02-01 21:20 ` Dmitry Gutov
2023-02-02 2:16 ` Yuan Fu
2023-02-02 6:34 ` Eli Zaretskii
2023-02-02 12:12 ` Dmitry Gutov
2023-02-02 14:23 ` Eli Zaretskii
2023-02-02 17:03 ` Dmitry Gutov
2023-02-02 17:26 ` Eli Zaretskii
2023-02-02 17:53 ` Dmitry Gutov
2023-02-02 18:03 ` Eli Zaretskii
2023-02-02 19:44 ` Dmitry Gutov
2023-02-01 13:10 ` Eli Zaretskii
2023-02-01 15:15 ` Dmitry Gutov
2023-01-26 17:12 ` Dmitry Gutov
2023-01-26 18:07 ` Dmitry Gutov
2023-01-26 20:46 ` Dmitry Gutov
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