Bun Runtime Begins Major Rewrite in Rust

Bun creator Jarred Sumner says the JavaScript runtime is being rewritten from Zig to Rust, with the official explanation living on Bun's own blog.

#19

Jarred Sumner, Bun's creator, said on X that the JavaScript runtime is being rewritten in Rust and linked to Bun's own post, "Rewriting Bun in Rust". For now, that makes this a story sourced from Bun's announcement and Sumner's post, not outside reporting. Even with that limit, the shift is notable: Bun has been closely associated with Zig, so the announcement points to a major change in how the project is discussed in public.

Rewriting Bun in Rust https://bun.com/blog/bun-in-rust

Jarred SumnerTECH#1505via X

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jsnode@thejsnodeTECH

@theo That's a hefty token bill shows how expensive large‑scale rewrites can get when using the API.

Bun Runtime Begins Major Rewrite in Rust

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