- Bun — runtime

Bun is a high-performance JavaScript runtime, package manager, and test runner built from scratch to eliminate toolchain bloat.

Bun replaces Node.js and its fragmented ecosystem with a single, ultra-fast binary written in Zig. By leveraging the JavaScriptCore engine, it achieves significantly faster startup times and lower memory usage than V8-based runtimes. It serves as a drop-in replacement for npm, yarn, and vitest, executing 'bun install' up to 25x faster than competitors. With native support for TypeScript, JSX, and environmental variables (no .env loaders required), Bun streamlines development into a unified workflow.

https://bun.sh