Articles from bun.com

Bun v1.4.3 releases with a fast built‑in TypeScript checker, 67‑89% lower idle CPU, new runtime APIs, and fixes for 166 issues across the toolchain.

Bun’s Node.js test suite tracker displays how many of Node.js v26.3.0’s 4,608 tests pass in Bun, currently showing a loading state.

Bun 1.4 rewrites the runtime in Rust, adds built-in headless browser automation, image and markdown APIs, boosts Node.js compatibility, and reduces CPU and memory usage.

Bun's engineers rewrote its JavaScript runtime from Zig to Rust with Claude Fable 5, eliminating many memory‑safety bugs and boosting stability and performance.

Bun v1.3.14 ships a built-in image processing API, 7x faster warm installs, experimental HTTP/2 and HTTP/3 clients and server, rewritten fs.watch(), and many other features and fixes.