Four months of VoidZero at Cloudflare: making the open-source JavaScript toolchain faster for all humans and agents
VoidZero at Cloudflare dropped 80+ releases, slashed React compile times 10×, and made linting 18× faster in just four months.
Why Now
VoidZero joined Cloudflare in early 2026 and committed to keeping its tools open‑source. The post reports on progress during its first four months there.
What Happened
Over 80 releases were shipped, more than 1,200 issues closed, and several performance gains were announced: Oxc React Compiler 10× faster, Vitest 5 up to 50% faster than Vitest 4, tsgolint up to 18× faster than ESLint, and Oxfmt formatters 7× faster than Prettier. Vite+ reached version 1.0 and a new “Bundled Dev” mode is in progress.
Why It Matters
These speedups cut developer feedback loops, enabling faster iteration on large codebases and improving the performance of automated agents that rely on linting, type‑checking, and building. Faster tooling can reduce build times and resource usage for massive web applications.
The Limitation
The reported improvements are based on specific benchmarks and may not generalize to all projects or environments; performance gains can vary with codebase size and configuration.
What You Can Do
Benchmark your own build or lint pipeline against the new Oxc or tsgolint releases to see if you gain similar speedups.
Source
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