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

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 1 Feb 2023 04:39:29 +0200
> From: Dmitry Gutov <dgutov@yandex.ru>
> Cc: casouri@gmail.com, 60953@debbugs.gnu.org
> 
> So here. I've installed the first patch, which didn't raise up too many 
> concerns previously, and here's the new iteration on the second patch. 

Thanks, but please in the future when you make changes which call
functions from external libraries that were not called previously, be
sure to do the DEF_DLL_FN/LOAD_DLL_FN and the #undef/#define dance
needed to avoid breaking the MS-Windows build.

> 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.