Scaling Real-Time Data Streams with WebSockets and Node.js for High Throughput

The guide argues that real-time features such as live dashboards, messaging, and collaborative tools increasingly require instant, persistent communication that traditional HTTP request-response patterns handle poorly. It explains that WebSockets provide a full-duplex, always-on channel after an initial HTTP handshake, which removes the overhead of repeated connections. Node.js is presented as a strong platform for WebSocket servers because of its event-driven, non-blocking I/O model, with the ws library cited as a popular choice. A basic echo server example illustrates the setup, though the author notes it lacks the optimizations needed for heavy traffic. The article then turns to scaling strategies, including the cluster module and load balancers with sticky sessions, to spread connections across multiple cores and instances.