GoKawiilCloudflare, VoidZero and Owner.com build tsrs, a Rust port of TypeScript compiler
Cloudflare and VoidZero announced they are collaborating with Max Schwenk of Owner.com on tsrs, a Rust implementation of the TypeScript compiler, built in coordination with the TypeScript team and incubated inside the Oxc JavaScript compiler toolchain. The group says tsrs is not a fork, and early benchmarks show it running up to 8x faster and using about 70% less memory than TypeScript 7.0 under matched worker configurations.
GoKawiil's interpretation of the reporting above, not reported fact.
Faster, lighter type-checking could shorten build and feedback cycles for developers and make it more feasible to run full TypeScript tooling in constrained environments like browsers, according to the project's stated goals. By explicitly deferring language design authority to the TypeScript team, the collaborators appear to be trying to avoid the compatibility risks and community fragmentation that have affected other alternative compiler efforts. The comparison to TypeScript 7.1 beta, which also gained speed partly from optimizations upstreamed from tsrs, suggests the two efforts may be reinforcing each other rather than competing.
- tsrs is a Rust port of the TypeScript compiler developed by Cloudflare, VoidZero, and Owner.com's Max Schwenk.
- It is being incubated in the Oxc toolchain and built in close coordination with the TypeScript team, not as an independent fork.
- Early benchmarks claim up to 8x speed gains and ~70% lower memory use versus TypeScript 7.0, with some optimizations already upstreamed into TypeScript 7.1 beta.
Source: blog.cloudflare.com, 2026-10-20
Published there as: “Tsrs: A Port of TypeScript to Rust”
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