Node.js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. Node.js’ package ecosystem, npm, is the largest ecosystem of open source libraries in the world. Node.js applications are written in JavaScript, and can be run within the Node.js runtime on OS X, Microsoft Windows, and Linux.

Being built on Google Chrome’s V8 JavaScript Engine, Node.js library is very fast in code execution. Node.js applications simply output the data in chunks therefore it never buffer any data. Node.js is well suited for applications that have a lot of concurrent connections and each request only needs very few CPU cycles, because the event loop is blocked during execution of a function. Since Node.js is lightweight and efficient, it is perfect for data-intensive real-time applications that run across distributed devices.

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