Rust rewrite of Tree-sitter speeds parsing up 29.74%, but full ast-grep initially regresses
mathemagic1an · x · 2026-07-27
A Tree-sitter core rewrite in Rust delivered measurable speedups, but the full ast-grep pipeline initially regressed.
- Raw parsing improved by 29.74%
- Tree traversal improved by 10.16%
- Generated parsers stayed compatible
- The full ast-grep workflow was at first slower, and the thread explains why
Related event: AI Helps Rewrite Tree-sitter in Rust(2 posts)→
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