AI-assisted Rust rewrite of Tree-sitter’s C core speeds parsing up 29.74%
charliermarsh · x · 2026-07-26
A developer rewrote Tree-sitter’s C core in Rust with AI assistance and reported measurable speedups:
- Raw parsing is 29.74% faster
- Tree traversal is 10.16% faster
- Generated parsers remain compatible
The post also notes an initial slowdown in the full ast-grep pipeline before explaining what changed.
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