Bun Blog

Bundle, install, and run JavaScript & TypeScript — all in Bun. Bun is a fast JavaScript runtime & toolkit with a bundler, test runner, and npm-compatible package manager built in.

Popular posts: 5
Total points: 3,865
HN comments: 1,993
Rank: #297 company

Visit bun.com → RSS feedOn Hacker News Sep 2025 – Aug 2026

Software Engineering 5 Infrastructure & DevOps 4 Tech Industry & Business 1

Most points Most discussed Most cited Newest

Anthropic acquires Bun

20252,192 points1,072 commentscited by 7Tech Industry & Business details

Bun has been acquired by Anthropic. Anthropic is betting on Bun as the infrastructure powering Claude Code, Claude Agent SDK, and future AI coding products & tools.

Rewriting Bun in Rust

2026795 points534 commentscited by 25Software Engineering details

Why & how we rewrote Bun from Zig to Rust

Behind the scenes of Bun Install

2025431 points152 commentscited by 5Software Engineering details

Learn how Bun is able to cut install times by up to 25×. Bun skips Node.js's overhead with direct system calls, cache-friendly data layouts, OS-level copy-on-write, and full-core parallelism.

Bun 1.4

2026261 points183 commentscited by 6Software Engineering details

Bun 1.4 rewrites Bun in Rust, ships built-in headless browser automation (Bun.WebView), Bun.Image, Bun.markdown, JSON5, JSONL, Terminal and cron APIs, Node.js 26.3.0 compatibility with 1,517 newly passing tests, parallel test and run, Windows ARM64, and an opt-in global virtual store for up to 7× faster installs.

Bun v1.3.9

2026186 points52 comments Software Engineering details

Fixes 23 issues (addressing 13 👍). Run multiple scripts in --parallel or --sequential. bun:test mock & spyOn get Symbol.dispose support. ESM bytecode compilation. Faster Bun.markdown. Faster RegExp, String.prototype.trim, String.prototype.startsWith.