Before going any further, we need to explain what a javascript runtime is and why we should care about its speed.
Imagine you write a story in JavaScript and need someone to read it aloud. The JavaScript runtime is like that friendly narrator that brings your story to life! This is the special environment in which your JavaScript stories are read and performed. But let’s dig a little deeper. Technically speaking, this "narrator" consists of components like the JavaScript engine, which is the core of the runtime and is responsible for understanding and running the code. It pairs with tools like the Event Loop, which manages tasks and ensures your code doesn't fend for itself, and the Memory Heap, which lets all the characters in the story (or variables) have their own space. There's also a call stack that tracks, scene by scene, where the action of the story occurs.
Introduction to Bun 1.0
Bun is a new JavaScript runtime that offers several major advantages over the popular Node JS and Deno. It is designed to make applications faster without adding additional complexity to your code.
It is designed as a drop-in replacement for Node.js. So when using Bun, you don't need Node, nodemon has built-in monitoring mode, dotenv cross-env reads .env files by default.
Bun can also run different files such as .js, .ts, .mjs, .jsx and .jsx, which means now you don't need to install babel, .cjs, and .cjs into your project. .tsxtscts-nodetsx
It's a JavaScript bundler with incredible performance and an esbuild-compatible plugin API, so you don't need esbuild, nor webpack, nor parcel.