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Re:Tree-sitter: an incremental parsing system for programmin... by ACosmicDust on Monday February 22, 2021 @11:22AM (#26226292)
Emacs does have a package to use tree-sitter [0]. I think emacs-lsp is aware of this highlighting backend and performs pretty well.

(semantic highlighting is pretty slow for C++ with font-lock, with tree-sitter it's a breeze :))

[0]: https://github.com/ubolonton/emacs-tree-sitter

Re:Tree-sitter: an incremental parsing system for programmin... by pdimitar on Wednesday February 24, 2021 @10:03AM (#26250587)
Wait what? You mean to tell me that Emacs LSP already uses tree-sitter?