Bun is a modern JavaScript runtime and package manager that delivers revolutionary performance improvements over traditional Node.js and npm workflows. Built from the ground up for speed and developer experience, Bun transforms how JavaScript applications are developed and deployed.

🚀 Performance Revolution

Installation Speed

• 20x faster than npm for dependency installation
• 3x faster than yarn and pnpm
• Native binary compilation for instant startup

Runtime Performance

• Near-instant script execution with optimized startup
• Native TypeScript support without compilation step
• Built-in bundler for production builds
• SQLite integration for database operations

Memory Efficiency

• Significantly reduced memory footprint
• Efficient garbage collection
• Optimized for modern hardware

🛠️ Core Features

Drop-in Replacement

# Replace npm with bun
bun install          # Instead of npm install
bun run dev         # Instead of npm run dev
bun run build       # Instead of npm run build

# All npm scripts work unchanged
bun run test        # Works with existing package.json

Built-in Tools

• Package manager with automatic lockfile management
• Test runner compatible with Jest/Vitest
• Bundler for production builds
• Transpiler for TypeScript and JSX
• Task runner for npm scripts

TypeScript Integration

// No compilation needed - runs directly
const greet = (name: string): string => {
  return `Hello, ${name}!`;
};

console.log(greet('World'));

📊 Benchmark Results

🏗️ Production Ready

Enterprise Features

• Production bundler with tree shaking
• Source maps for debugging
• Minification and compression
• Code splitting support
• Plugin system for extensibility

Framework Support

• React with Fast Refresh
• Next.js integration
• Svelte support
• Vue.js compatibility
• Express.js applications

🔧 Migration Guide

From npm

# Replace npm commands
npm install → bun install
npm run dev → bun run dev
npm run build → bun run build
npm test → bun test

# Lockfile automatically managed
# package-lock.json → bun.lockb

From yarn

# Direct replacement
yarn install → bun install
yarn dev → bun run dev
yarn build → bun run build

From pnpm

# Similar workflow
pnpm install → bun install
pnpm dev → bun run dev
pnpm build → bun run build

🌟 Developer Experience

Instant Feedback

• Hot reload for development
• Error overlay with helpful messages
• Type checking in real-time
• Auto-completion in editor

Zero Config

• No configuration needed for most projects
• Sensible defaults for all tools
• Automatic detection of project type
• Plugin auto-discovery

🔒 Security & Reliability

Built-in Security

• Automatic dependency scanning
• Vulnerability detection
• Secure by default runtime
• Sandbox execution environment

Stability

• Backward compatible with Node.js APIs
• Stable API surface
• Comprehensive testing suite
• Active maintenance and updates

📈 Adoption & Community

Growing Ecosystem

• Active development with frequent releases
• Community plugins and extensions
• Framework integrations expanding
• Enterprise adoption increasing

Industry Recognition

• Performance leader in benchmarks
• Developer favorite for speed
• Innovation driver in JavaScript ecosystem
• Future-focused architecture

🎯 Use Cases

Perfect For

• Modern web applications requiring speed
• API development with fast iteration
• Full-stack JavaScript projects
• Microservices and serverless functions
• CLI tools and utilities

Enterprise Ready

• Production deployments
• CI/CD pipelines
• Docker containers
• Cloud platforms
• Edge computing

🚀 Getting Started

Installation

# macOS
curl -fsSL https://bun.sh/install | bash

# Linux
curl -fsSL https://bun.sh/install | bash

# Windows (via WSL)
curl -fsSL https://bun.sh/install | bash

Quick Start

# Create new project
bun create react my-app
cd my-app

# Install dependencies
bun install

# Start development
bun run dev

# Build for production
bun run build

🔮 Future Roadmap

Upcoming Features

• Enhanced debugging tools
• Advanced bundling options
• Native mobile development
• WebAssembly integration
• Performance monitoring

Ecosystem Growth

• Framework partnerships
• Tool integrations
• Plugin marketplace
• Educational resources

Website: bun.sh
GitHub: oven-sh/bun
Documentation: bun.sh/docs
Benchmarks: bun.sh/benchmarks