V8 Engine

Summary

Google's open-source JavaScript engine (also used in Chrome) that compiles JS to machine code — the actual execution engine underneath every Node.js program.

How to Learn This

1Read a short explainer on how V8 compiles and optimizes JavaScript.
2Learn what JIT (Just-In-Time) compilation means at a high level.
3Understand that Node.js itself is just V8 plus a set of additional APIs (libuv, Node APIs).

Node.js Runtime

Event Loop

More topics in Node.js Fundamentals

Node.js Runtime Event Loop Non-Blocking I/O Modules (CommonJS vs ESM)NPM & Package Management package.json Async Programming Callbacks Promises Async/Await Streams Buffers File System (fs)Process & Environment Variables Event Emitter Child Processes Clustering

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