uWebSockets.js - μWebSockets for Node.js back-ends

µWebSockets.js is an HTTP/WebSocket server for Node.js that runs 8.5x that of Fastify and at least 10x that of Socket.IO. It comes with both router and pub/sub support and is suited for extraordinary performance needs. Being written in native code directly targeting the Linux kernel makes it way faster than any JavaScript implementation. It powers many of the biggest crypto exchanges in the world, handling trade volumes of multiple billions of USD every day.