Subject: bug#69071: Emacs master branch: c-ts-mode is slow with large C functions.

From: Eli Zaretskii <[email-masked]>
Date: Sun, 25 Feb 2024 07:48:00 +0200

> From: Yuan Fu <[email-masked]>
> Date: Sat, 24 Feb 2024 12:35:50 -0800
> Cc: [email-masked],
>  [email-masked]
> 
> 
> 
> > On Feb 20, 2024, at 5:55 AM, Eli Zaretskii <[email-masked]> wrote:
> > 
> >> From: Yuan Fu <[email-masked]>
> >> Date: Mon, 19 Feb 2024 21:49:26 -0800
> >> Cc: Alan Mackenzie <[email-masked]>,
> >> [email-masked]
> >> 
> >> Before we continue, let me note that this seems like another case where tree-sitter-c parser chokes on some extreme C code. Profiler reports shows that almost all time are spent in treesit-parser-root-node, which indicates that all the time are spent parsing the text.
> > 
> > So maybe this is something to report to tree-sitter and/or
> > tree-sitter-c developers?  (Does c++-ts-mode behave better with this
> > file?)
> 
> We could, but honestly I don’t think they can/want to do anything.

I suggest to report this anyway: we don't have anything to lose, and
there's a chance they would like to do something.

Thanks.