Summary & Key Takeaways ​

• Bun's core has been entirely rewritten from Zig to Rust.
• This architectural shift aims to deliver substantial performance gains.
• The rewrite also targets improved stability and maintainability for the runtime.
• This is a major engineering effort for the popular JavaScript toolkit.

Our Commentary ​

This is a huge move. I'm genuinely curious about the motivations beyond the obvious performance and safety. Was Zig not scaling as expected for their long-term vision? Or is Rust just a better fit for the team's expertise? Either way, this is a bold bet.