rjest Rust Drop-in replacement for Jest. A Rust daemon caches SWC transforms and pre-warms Node workers.
rjest keeps a Rust daemon (jestd) running in the background, caching SWC transforms and pre-warming Node.js workers. Warm runs land around 14ms. It reads your existing jest.config.* with zero changes and supports the standard Jest CLI flags.
Install
$ npm install -D rjest-installFrequently asked questions
What is rjest?
rjest is Drop-in replacement for Jest. A Rust daemon caches SWC transforms and pre-warms Node workers. It is part of the Neul Labs open-source portfolio (36 MIT-licensed projects for AI agent infrastructure). rjest keeps a Rust daemon (jestd) running in the background, caching SWC transforms and pre-warming Node.js workers. Warm runs land around 14ms. It reads your existing jest.config.* with zero changes and supports the standard Jest CLI flags.
How do I install rjest?
Install with: `npm install -D rjest-install`. rjest is MIT licensed and ships prebuilt binaries where applicable.
What language is rjest written in?
rjest is written in Rust.
Is rjest open source?
Yes. rjest is MIT licensed and publicly available at https://github.com/neul-labs/rjest. All 36 Neul Labs projects are MIT licensed.
How does rjest compare to alternatives?
See the detailed comparison at https://www.neullabs.com/compare/rjest-vs-jest.