After months of anticipation, Bun 0.2.0 has officially launched, bringing the blazing-fast JavaScript runtime to a new level of maturity. Bun is not just another Node.js alternative – it’s a complete toolkit that combines a runtime, bundler, test runner, and package manager into one cohesive, performance-focused platform.

1. Production-Ready Stability

Bun 2.0 is officially labeled as production-ready, with extensive testing across thousands of real-world applications:

  • Full Node.js API compatibility (99.9%)
  • Stable APIs with semantic versioning guarantees
  • Enterprise support options available
  • Battle-tested by major companies in production

This means you can confidently use Bun for your production applications without worrying about breaking changes.

2. Native Windows Support

One of the most requested features is finally here – native Windows support:

  • Full compatibility with Windows 10 and 11
  • Native file system operations
  • Windows-specific optimizations
  • Cross-platform development made easy

This opens up Bun to millions of developers who work primarily on Windows machines.

3. Revolutionary Package Manager Performance

The Bun package manager continues to outperform competitors:

  • 20-100x faster than npm
  • 10-25x faster than pnpm and Yarn
  • Global cache system that saves disk space
  • Workspaces support for monorepos
  • Automatic peer dependency resolution

Example:

bun install # Installs packages in milliseconds

4. Built-in Test Runner with Watch Mode

Bun 2.0 enhances the integrated test runner with new features:

  • Watch mode for instant test feedback
  • Parallel test execution by default
  • Compatible with Jest syntax
  • Code coverage reports built-in
  • Snapshot testing support

Example:

import { test, expect } from "bun:test";
test("fast test execution", () => {
expect(2 + 2).toBe(4);
});

5. Superior Bundler Performance

The Bun bundler now includes advanced optimization features:

  • Tree shaking that actually works
  • Code splitting for optimal loading
  • CSS and asset handling
  • TypeScript transpilation without extra config
  • Production-ready minification

6. Native TypeScript Support

No configuration needed – Bun runs TypeScript files directly:

  • Instant transpilation
  • Full type checking support
  • .ts, .tsx, .jsx support out of the box
  • No need for separate build steps

Why Bun is a Big Deal

Bun 0.2.0 represents a fundamental shift in JavaScript tooling. While Node.js has been the standard for over a decade, Bun challenges that position with dramatically better performance across every metric. The unified approach – runtime, bundler, test runner, and package manager all in one tool – simplifies the entire development workflow.

For developers building high-performance applications, APIs, or working with large monorepos, Bun 0.2.0 offers measurable improvements in development speed and application performance.

The JavaScript ecosystem is evolving, and Bun 0.2.0 is leading the charge toward a faster, more efficient future.