Bun

Bun at a glance

Bun is a fast, modern JavaScript runtime, bundler and package manager, an increasingly popular all-in-one alternative to Node.js. Bun ships frequent releases plus security fixes; as a runtime and toolchain under applications and builds, keeping it current matters.

For admins Bun moves quickly, so keep it current for security and compatibility fixes, and pin the version in projects, containers and CI for reproducibility. As a runtime beneath an application, the application's requirements set the version; as a package manager, it resolves dependencies that carry their own supply-chain risk — audit them. Because Bun is younger and fast-evolving than Node, test applications when moving versions, since behaviour and API coverage change. After updating, run the app and its tests. Source it officially. Its speed is a draw, but currency and pinning are the operational discipline. Patchletter surfaces new Bun releases so security fixes land.