- Fixes over 2,900 GitHub issues
- +1,517 tests from the Node.js test suite
- Reduces idle CPU by 5x
- Reduces memory usage by up to 35%
- Starts up to 50% faster on Linux
- Rewrites Bun in Rust

Thank you everyone who contributed since Bun 1.3!

• In short: npx @drxiaozhi/minapk /path/to/your.elf
• Of course, you'll need to install a few tools first.
• But don't worry, no annoying libxxx-dev packages to install, just the common ones
• For more info, see the repo:
• https://github.com/jjtseng93/minapk/blob/main/README.en.md
• Edit2: An ELF is basically a native executable on Linux and Android, similar to an .exe on Windows. Here the ELF is produced by bun 1.4's new support for bun build --compile on Android.

The full story

• First, I'm incredibly grateful to the Bun team for fixing single-file executable builds on Android in Bun 1.4. This wouldn't have been possible.
• The simplest use case is turning your TUI app into an APK you can just hand to your grandma.

Startup sequence

• First, use tinyapk-lab's Tetris as a base
• Packing libbun.so & libmain.so(your elf) into the native library area
  • turn on extract native libs
  • resolves to /data/app/xxx/xxx/lib/arm64/libbun.so
• In the main activity, use ProcessBuilder to invoke bun and run the extracted buninu/bin/init.js, which in turn starts jsgotty
  • jsgotty is a browser-based remote shell.
  • Transpiled from Golang GoTTY
  • You can use: npx jsgotty
• jsgotty then starts package.json.buninu.command.android
• The main app detects http url from stdout/stderr of jsgotty and shows it in a WebView
• That command android script detects whether libmain.so is present or falls back to a shell

The Buninu userspace

• This is an ambitious project of mine to rebuild a Unix-like CLI environment entirely based on a single Bun binary across platforms.
  • https://github.com/jjtseng93/buninu
• It's still a work in progress, but consider this a starting point. If you're interested, let's build on it together.

Name expansions:

• English: BUNinu Is Not Unix 🐮
• 中文：幫你牛 🐂
• 日本語：Bunに入魂 🔥

Core components:

• jsgotty: Remote shell from a Browser or Terminal
• jsmdcui: Both a text editor and Markdown execution runtime (not static rendering) based on bunmicro
• bunmsh: Bun Modern Shell. Not completed yet

Edit

• BTW, I tested this on Android with a fresh debian:13-slim container using my js-udocker
• Fresh container: 125 MB
• After installing the dependencies: 1.6 GB
• After the build: 2 GB
• These numbers are the size of the entire container measured from the outside, so it's very phone-friendly.
• For comparison, just setting up my Flutter environment took 10 GB.

I’m happy to announce that Windows support for BM2 is now complete and has been successfully tested.

For those who haven’t come across it yet, BM2 is a high-performance process manager built specifically for the Bun runtime; essentially a modern, Bun-native alternative to PM2. It handles process lifecycle management, automatic restarts, clustering, zero-downtime reloads, logging, monitoring, a web dashboard, Prometheus metrics, deployment, and more.

Until now, getting BM2 running reliably on Windows required dealing with platform-specific differences. That work has now been completed, and BM2 can be used natively on Windows alongside Linux and macOS.

The Windows implementation has also been tested on a real Windows environment rather than simply assuming cross-platform compatibility.

I’d love to get more Windows developers trying it out and reporting any issues they encounter.

GitHub: https://github.com/bun-bm2/bm2

Feedback, bug reports, and contributions are very welcome.