Bun JavaScript runtime being ported from Zig to Rust
Original: Bun is being ported from Zig to Rust
Why This Matters
Major architectural shift for popular JavaScript toolchain could impact performance and ecosystem
Bun, the high-performance JavaScript runtime and bundler, has begun porting its codebase from Zig to Rust. A new commit on GitHub reveals documentation for Phase-A of the porting process, marking a significant architectural shift for the popular developer tool.
Oven-sh's Bun project has started transitioning its implementation from Zig to Rust programming language. The GitHub commit by Jarred-Sumner adds a porting guide document with 622 new lines of documentation outlining Phase-A of the migration process. Bun, known for its fast JavaScript runtime, bundler, and package manager capabilities, currently uses Zig for much of its low-level implementation. The porting guide suggests a systematic approach to rewriting core components in Rust. This represents a major technical decision for the project, which has gained significant adoption with 89.6k GitHub stars. The documentation includes scripts for batch porting, indicating an organized migration strategy rather than a complete rewrite.