Bun: The New JavaScript Runtime
Álvaro José Agámez Licha
Senior Software Developer
Overview
What is Bun?
Bun is an all-in-one toolkit (runtime, package manager, bundler, test runner) for JavaScript and TypeScript apps. It ships as a single executable called bun.
Bun is stable and production-ready.
Features
Key Features of Bun
- Great performance
- Runtime
- Package manager
- Test runner
- Bundler
- Package runner
- TypeScript is a first-class citizen
BUN
It's not a Fight, but...
Node.js, Deno
esbuild, rspack, Parcel, Rollup, Webpack
TSC, Babel, ts-node, ts-node-esm
pnpm, npm, Yarn
Vitest, Jest, Mocha, AVA, SinonJS
Performance
Bun's Impact on JavaScript Performance
- It natively implements hundreds of Node.js and Web APIs.
- Obsession with Performance.
- JavaScriptCore.
- Zig Language.
Compatibility
Bun's Compatibility with Existing JavaScript Code
Most npm packages intended for Node.js environments will work with Bun out of the box.
| Built-in module | Total |
|---|---|
| Fully implemented | 30 |
| Partially implemented | 15 |
| Not implemented | 5 |
Adoption
How to Start Using Bun in Your Projects
# For macOS, Linux, and WSL
$ curl -fsSL https://bun.sh/install | bash
# To install a specific version
$ curl -fsSL https://bun.sh/install | bash -s "bun-v1.0.0"Bun for Visual Studio Code
https://marketplace.visualstudio.com/items?itemName=oven.bun-vscode
Benchmark Time
Introducing Static Hermes
- Optional ahead-of-time compilation to native code.
- C performance with JavaScript usability.
- Mix and match bytecode and native code based on your needs.
- Requires sound types for performance.
- Not ready for general usage yet, a work in progress.
Bun: The New Javascript Runtime
By Alvaro Agamez
Bun: The New Javascript Runtime
Bun is a new JavaScript runtime that is generating a lot of excitement in the developer community. It is designed to be fast, lightweight, and efficient, and it offers a number of features that are not available in other JavaScript runtimes.
