“We are not forking TypeScript”: Cloudflare spearheads Rust port written by agents, for agents
Cloudflare has taken ownership of tsrs, a Rust-based reimplementation of TypeScript designed to support AI coding agents while reducing computational overhead. The port delivers significant performance gains—up to 8x faster execution and 70% lower memory usage than TypeScript 7.0—while maintaining collaboration with Microsoft's TypeScript team rather than forking independently. Microsoft's TypeScript 7.1 already benefits from shared optimizations, running 2.5x faster as a result of this partnership.
Key points
- Cloudflare adopts Rust TypeScript port (tsrs) for AI agent efficiency
- 8x faster execution, 70% less memory than TypeScript 7.0
- Improvements shared with Microsoft; TypeScript 7.1 sees 2.5x speedup
- Partnership model avoids formal fork while enabling collaboration
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