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Claude Code uses Bun written in Rust now
TL;DR
Claude Code v2.1.181 and later versions now utilize a Rust port of Bun, resulting in a 10% faster startup on Linux. This change was largely unnoticed, indicating stability in performance.
✦ Why It Matters
Engineers should consider testing the Rust version of Bun for potential performance improvements in their applications.
Key Takeaways
- Upgrade to Claude Code v2.1.181 for performance gains.
- Test the Bun canary release for early access to features.
- Monitor performance metrics after upgrading.
- Explore Rust for future projects to enhance efficiency.
How It Works
The Rust port of Bun enhances performance by optimizing the runtime environment, leading to faster execution and reduced startup times. This is achieved through Rust's memory safety and concurrency features, which allow for more efficient resource management.