WebSocket-Node

It depends on how it's implemented. I used node.js to implement the websocket-based real-time aspects of my startup, Worlize, a graphical avatar-based chat platform where everyone can create their own chat world. I use a sharded approach where each room is assigned to a random node.js websocket server when the first person enters it, and it's unloaded when the last person leaves. Just spin up more websocket servers to scale. We have a hybrid platform with the website running on Ruby on Rails (REE 1.8.7, Unicorn, fronted by Nginx), and the real-time interaction handled by Node.js. I can tell you that the RoR servers fall over LONG before the Node.js servers even begin to break a sweat. edit: Link to Worlize if you're curious: https://www.worlize.com/ Our Node.JS WebSocket Library: https://github.com/Worlize/WebSocket-Node