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bug#58979: treesitter-regression with json-mode
From: |
Stefan Kangas |
Subject: |
bug#58979: treesitter-regression with json-mode |
Date: |
Sat, 12 Nov 2022 12:34:03 -0800 |
Johann Höchtl <johann.hoechtl@gmail.com> writes:
> When I open a large json file (about 3_000_000 lines, about 72Mb,
> pretty-printed) Emacs 29.0.50 opens the file just fine in
> `js-json-mode` and when using regexp-based font locking, it works
> well.
>
> When I force this buffer into javascript-mode, Emacs hangs. Memory
> consumption as reported by Windows task manager "dances" around 2Gb,
> yet even after waiting for three minutes, Emacs doesn't get responsive
> any more.
>
> I consider this an unfortunately regression as recent commits to Emacs
> 29 (long lines patches) actually makes working with such large files
> with long lines absolutely pleasant, yet as it seems the interaction
> with tree-sitter destroys this gains.
Copying in Yuan Fu.