Bun

Introduction The JavaScript ecosystem has long been dominated by npm (Node Package Manager), the default package manager that ships with Node.js. Over the past few years, however, a new contender has emerged: Bun. Billed as a fast, all‑in‑one runtime, Bun includes its own package manager that promises dramatic speed improvements, a modern API surface, and tighter integration with the underlying runtime. For developers, teams, and organizations that rely heavily on npm for dependency management, the question isn’t simply “Should I try Bun?” but “How does Bun compare to npm across performance, compatibility, workflow, and ecosystem?” This article provides a comprehensive, in‑depth comparison that covers: ...

Table of Contents Introduction What Is Bun? 2.1 Historical Context 2.2 Core Design Goals Architecture Overview 3.1 The Zig Foundation 3.2 V8 Integration vs. Bun’s Own Engine 3.3 Bundler, Task Runner, and Package Manager Getting Started with Bun 4.1 Installation 4.2 “Hello, World!” in Bun Bun as a Runtime: API Compatibility 5.1 Node.js Compatibility Layer 5.2 Web APIs and Fetch Bun’s Built‑In Bundler 6.1 Why a Bundler Matters 6.2 Practical Example: Bundling a React App Package Management with bun install 7.1 Speed Comparisons 7.2 Workspaces and Monorepos Task Runner & Script Execution 8.1 Defining Scripts in bunfig.toml 8.2 Parallel Execution and Caching Performance Benchmarks 9.1 [Startup Time] 9.2 [Throughput & Latency] 9.3 [Real‑World Case Studies] When to Choose Bun Over Node/Deno Limitations and Gotchas Future Roadmap and Community Conclusion Resources Introduction JavaScript has long been the lingua franca of the web, but its ecosystem has evolved dramatically since the early days of Node.js. Developers now juggle runtimes, package managers, bundlers, and task runners—each with its own configuration files, version constraints, and performance quirks. Enter Bun, a newcomer that promises to collapse that fragmented toolchain into a single, ultra‑fast binary. ...

Introduction Since its launch in 2022, Bun has rapidly become one of the most talked‑about JavaScript runtimes. Built on top of the Zig programming language and the JavaScriptCore engine, Bun promises blazing‑fast start‑up times, low memory footprints, and a batteries‑included standard library that includes a modern HTTP server. If you’ve spent years building APIs with Node.js, Express, or Fastify, you might wonder whether Bun’s HTTP server can replace—or at least complement—your existing stack. This article dives deep into the Bun HTTP server, covering everything from installation and basic usage to advanced routing, middleware, WebSockets, performance tuning, and production deployment. By the end, you’ll have a production‑ready codebase and a clear understanding of where Bun shines and where you still might need to reach for other tools. ...