Bun 1.0

Bun 1.0  is a JavaScript and TypeScript runtime with debugging capabilities and support for popular web frameworks. A modern JS runtime environment like Node.js or Deno with built-in JSX and TypeScript support. Developed with a focus on fast startup, high performance and self-sufficiency. Inside Bun there is a JavaScript transpiler (transpiling compiler) built into the runtime environment. This means you can run JavaScript, TypeScript, and even JSX/TSX files without any dependencies when running Bun.
Bun uses the JavaScriptCore engine developed by WebKit, which starts and executes slightly faster and uses memory slightly more efficiently than classic engines like V8.