UVU

UVU is a lightweight, ultra-fast JavaScript test runner for Node.js and the browser created by Luke Edwards (lukeed). Its primary goal is to minimize overhead: startup time, memory usage, and complexity are all kept very low so that developers can write and run tests with minimal friction. The tool supports modern features like async/await and native ES Modules, making it suitable for modern codebases. It also supports running in browser environments, which makes it versatile for frontend and backend alike. The repository includes benchmarking showing how it stacks against other test runners in terms of speed, underscoring its performance orientation. uvu’s API is intentionally minimal and familiar, so developers coming from other test frameworks will feel at home, but the internal design is optimized for speed and simplicity rather than feature bloat.