Clipping: Using JavaScript to Build High-Performance Network Programs

Node.js — also called Node — is a server-side JavaScript environment (see nodejs). It’s based on Google’s runtime implementation — the aptly named “V8” engine. V8 and Node are mostly implemented in C and C++, focusing on performance and low memory consumption. But, whereas V8 supports mainly JavaScript in the browser (most notably, Google Chrome), Node aims to support long-running server processes.