Bun

Definitions

1. A JavaScript runtime, bundler, and package manager written in Zig, designed to be a faster drop-in replacement for Node.js. Claims dramatically faster startup and execution times. The new kid competing with Node and Deno.

   In plain English: A newer, faster alternative to Node.js for running JavaScript, built from scratch to also handle bundling code and installing packages — all in one tool instead of three.

2. Bun's key technical differentiator is being written in Zig (instead of C++ like Node or Rust like Deno), and using JavaScriptCore (Safari's engine) instead of V8. This architectural choice contributes to its speed claims but raises questions about ecosystem compatibility.

   Example: 'We switched our dev environment to Bun and npm install went from 45 seconds to 3 seconds. Production still runs Node though — we're not that brave yet.'

   Source: technical architecture

Related Terms

• TypeScript
• Node.js
• npm
• Deno
• Node
• Tree Shaking
• JavaScript Module
• Managed Language
• Memo
• Memory Budget
• Memory Pressure
• Module Loader
• Module System
• Plugin System
• Polyfill
• Preload
• Private Field
• Scroll Event
• Static Import
• Strict Mode
• Svelte
• Type Coercion
• V8
• Stop the World
• Browser Runtime
• Class Loader
• Code Cache
• Code Performance