“We are not forking TypeScript”: Cloudflare spearheads Rust port written by agents, for agents
Cloudflare's Rust port of TypeScript, tsrs, delivers 8x speed and 70% less memory than TypeScript 7.0, with optimizations already flowing back into Microsoft's 7.1 beta (2.5x faster). Led by director of engineering Christoph Nakazawa, the effort is explicitly not a fork but a collaboration with Microsoft's TypeScript team, including principal product manager Daniel Rosenwasser, who noted that tsrs discoveries improved 7.1. Cloudflare targets AI coding agents that exhaust resources during type checking, and Rust's WebAssembly compatibility offers further advantages over Go for constrained environments.