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Bun

DEVOPS
Velocity6.3

Fast all-in-one JavaScript runtime and toolkit

bun.sh ↗

Bun 1.4.4 adds bun fmt, a built-in Prettier-compatible formatter, two weeks after bun check.

javascript-runtimetoolchainformatterpackage-managerperformance
◆Current state
Bun now covers formatting as well as type checking: v1.4.4 ships bun fmt, a Prettier-compatible formatter it says is 3-6x faster than oxfmt, and makes bun check 1.4-7.8x faster on large projects. The same release closes 271 issues, migrates Yarn Berry lockfiles, adds install retries with backoff, and cuts Bun.SQL CPU per query by up to 48%.
◆Where it's heading
After the Rust rewrite in July and bun check in v1.4.3, Bun is absorbing the remaining steps of a TypeScript toolchain one release at a time. Package-manager reliability work (Yarn Berry migration, retries, faster hoisted installs) shows it is also going after teams still on other package managers.
◆Prediction
Expect a linter or lint mode next to round out the check/fmt pair, and more lockfile migrations aimed at pnpm and Yarn users.

◆Recent moves

  1. 7d ago

    Bun 1.4.4 adds bun fmt formatter, faster bun check

    v1.4.4 follows bun check with bun fmt, so Bun now formats as well as type-checks TypeScript without outside tools. Alongside it come Yarn Berry lockfile migration, install retries, and SQL and sqlite upgrades. It extends the toolchain push that v1.4.3 started rather than opening a new front.

    View source ↗
  2. 19d ago

    Bun v1.4.3 adds bun check, a built-in TypeScript type checker

    ⚡ SPARK

    Type checking was the last major step in a TypeScript workflow that Bun did not handle itself, and v1.4.3 adds it with bun check and a --check flag on run, build and test. It extends the run of releases since 1.3.12 that fold separate tools into the runtime, and the 67-89% idle CPU cut and faster node:http responses keep the production-server work moving alongside it.

    View source ↗
  3. 1mo ago

    Bun v1.4.2

    v1.4.2 patches two regressions from v1.4.1 — an Elysia/AsyncLocalStorage interaction and a Discord.js hang — plus a JPEG decoding fix. Expected cleanup after a large feature drop.

    View source ↗
  4. 1mo ago

    Bun v1.4.1

    v1.4.1 is the most feature-dense Bun release since 1.0: HTTP/2 in Bun.serve, workspace node_modules isolation, argon2, 9x faster Buffer I/O, and 2x faster AsyncLocalStorage together close the remaining gaps preventing Bun from replacing Node.js in production server workloads.

    View source ↗
  5. 3mo ago

    Bun rewrites its runtime from Zig to Rust

    ⚡ SPARK

    Bun's full rewrite from Zig to Rust is the most consequential architectural decision since the project's founding — it reshapes the runtime's safety profile, contributor ceiling, and long-term credibility as production infrastructure.

    View source ↗
  6. 5mo ago

    Bun v1.3.14

    v1.3.14 introduced Bun.Image as a built-in image processing API, 7x faster warm package installs via an isolated linker global store, and experimental HTTP/2 and HTTP/3 client support — the point where Bun started broadening from a runtime into a batteries-included platform.

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