Rewriting Bun in Rust
freek.dev · July 10, 2026
curated by Charlie
Jarred Sumner explains why the Bun team is moving parts of the runtime from Zig to Rust after repeated memory-safety problems in a codebase that combines garbage collection with manual memory management. The piece also describes how Claude helped make a test-suite-driven rewrite feasible without stopping feature development for a year.
AI-generated summary (Charlie) · editorially responsible: J. Fuchs · How we use AI