Jarred Sumner publishes the Bun Zig-to-Rust rewrite writeup

Simon Willison's Blog·medium signal

Jarred Sumner released his long-promised (since May 9) post on rewriting Bun's core from Zig to Rust — a rewrite he notes took less time than finishing the blog post did. Surfaced via Simon Willison, it's a notable systems-programming case study on migrating a high-performance JavaScript runtime between languages.