Simon WillisonSun, 19 Jul 2026 03:54:09 GMT2026-07-19
Claude Code uses Bun written in Rust now
<p>In <a href="https://bun.com/blog/bun-in-rust">Rewriting Bun in Rust</a> Jarred Sumner made the following claim:</p> <blockquote> <p>Claude Code v2.1.181 (released June 17th) and later use the Rust port of Bun. Startup got 10% faster on Linux but otherwise, barely anyone noticed. Boring is good.</
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