Bun

bun.sh

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A fast all-in-one JavaScript runtime, package manager, bundler, and test runner — designed as a drop-in replacement for Node.js with dramatically faster startup times and install speeds.

Why it is useful

Can replace Node.js, npm, webpack, and Jest in a single binary. Package installs are 5–10x faster than npm and scripts start near-instantly, which adds up noticeably in CI pipelines and large monorepos. Compatible with most Node.js code and npm packages. Worth testing in any project where startup time or install speed is a pain point.