bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient

[Dmitry Gutov]

On 02/02/2023 08:34, Eli Zaretskii wrote:
> > Date: Wed, 1 Feb 2023 23:20:50 +0200
> > Cc:casouri@gmail.com,60953@debbugs.gnu.org
> > From: Dmitry Gutov<dgutov@yandex.ru>
> >
> > On 01/02/2023 15:39, Eli Zaretskii wrote:
> > > > Please see the attachment.
> > > >
> > > > To note the numbers: the first patch does quite well to improve the
> > > > performance of modes which use :match in queries which match a lot of
> > > > nodes (e.g. rust-ts-mode or ruby-ts-mode). There boost in those was on
> > > > the order of 25%.
> > > >
> > > > The second one is longer, and the boost (on top of the first one) is
> > > > around 5-6%, stable. Not as impressive, but at least it brings :match's
> > > > performance a little above :pred's in my example.
> > > Fine by me, if Yuan also approves.
> > For emacs-29, right?
> Yes.

Please take a look at this additional patch on top of the other one. It 
is ok?

I just remembered that if we don't want to auto-anchor the regexp, then 
'looking-at' is not the appropriate semantic. So this switches to 
'search_buffer'.

treesit_predicate_match_use_search_buffer.diff
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