Following are the main advantages of Node.js:

• Node.js is asynchronous and event-driven. All API?s of Node.js library are non-blocking, and its server doesn’t wait for an API to return data. It moves to the next API after calling it, and a notification mechanism of Events of Node.js responds to the server from the previous API call.
• Node.js is very fast because it builds on Google Chrome?s V8 JavaScript engine. Its library is very fast in code execution.
• Node.js is single threaded but highly scalable.
• Node.js provides a facility of no buffering. Its application never buffers any data. It outputs the data in chunks.