Bun Has a Free JavaScript Runtime That's 4x Faster Than Node — Bundler, Test Runner, and Package Manager Built In

The Node.js Toolchain Problem A Node.js project needs: Node runtime, npm/yarn/pnpm (package manager), esbuild/webpack (bundler), jest/vitest (test runner), tsx/ts-node (TypeScript runner). That's 5+ tools. Bun replaces all of them. One binary. Written in Zig. 4x faster than Node. What Bun Gives You Fast Package Install bun install # 25x faster than npm install Bun uses a global cache and hardlinks. node_modules appears in milliseconds. Native TypeScript bun run server.ts # No compilation step Built-In Bundler bun build ./src/index.ts --outdir ./dist Faster than esbuild. Supports code splitting, tree shaking, and minification. Built-In Test Runner import { expect , test } from ' bun:test ' ; test ( ' 2 + 2 ' , () => { expect ( 2 + 2 ). toBe ( 4 ); }); bun test # Jest-compatible API SQLite Built In import { Database } from ' bun:sqlite ' ; const db = new Database ( ' app.db ' ); db . run ( ' CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT) ' ); const users = db . quer