Node.js is an event-driven runtime environment built with the Google V8 JavaScript engine. It’s used for scalable applications that require live communication between a web server and the worldwide web users and can noticeably accelerate the overall performance of any Internet site that’s using it. Node.js is designed to process HTTP web requests and responses and constantly delivers little bits of information. For instance, if a new user fills a subscription form, the moment any information is inserted in one of the boxes, it’s sent to the server even if the remaining fields are not filled out and the user has not clicked any button, so the information is processed much faster. In comparison, conventional platforms wait for the whole form to be filled out and one sizeable hunk of information is then submitted to the server. No matter how tiny the difference in the processing time may be, things change in case the website expands and there’re lots of users using it simultaneously. Node.js can be used by booking portals, interactive web browser video games or web-based chat clients, for example, and plenty of companies, including LinkedIn, eBay and Yahoo, have already integrated it into their services.