Bun Has a Free JavaScript Runtime That Is 3x Faster Than Node.js

#bunjs #javascript #runtime #opensource

Bun is an all-in-one JavaScript runtime built from scratch using Zig and JavaScriptCore. It replaces Node.js, npm, webpack, and Jest — and runs 3x faster.

What You Get for Free

3x faster startup than Node.js
Built-in bundler — replaces webpack/esbuild
Built-in test runner — Jest-compatible
Built-in package manager — 25x faster than npm
TypeScript native — no build step
Node.js compatible — drop-in replacement
SQLite built-in — no external dependency

HTTP Server

Bun.serve({
  port: 3000,
  fetch(req) {
    return new Response('Hello World');
  },
});

Package Management

bun install  # 25x faster than npm install
bun add express
bun run dev

Built-in SQLite

import { Database } from 'bun:sqlite';
const db = new Database('mydb.sqlite');
db.run('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)');
db.run('INSERT INTO users (name) VALUES (?)', ['Alice']);