discover-realtime

WebSockets enable bidirectional communication over a single connection, ideal for chat and live collaboration. Server-Sent Events (SSE) provide one-way server-to-client streaming, better for live dashboards and notifications. Choose WebSockets when clients need to send frequent updates; use SSE for simpler push-only scenarios.

Pub/sub patterns decouple publishers from subscribers through a message broker, enabling efficient data distribution. Implement by defining topics, having clients subscribe to relevant channels, and publishing updates that automatically reach all subscribers. This scales better than direct connections when multiple clients need the same live updates.

Push notifications work well for alerting users outside your app and don't require persistent connections. WebSockets maintain open connections for continuous real-time streaming within your application. Use notifications for time-insensitive events; use WebSockets for interactive, low-latency features like live dashboards or chat.

Yes. Many applications use WebSockets for interactive features, SSE for one-way broadcasts, and push notifications for background alerts. The choice depends on client capabilities, latency requirements, and whether communication is bidirectional. Combining approaches lets you optimize for each use case.

Real-time systems face challenges with connection persistence, network reliability, and scaling across multiple servers. Pub/sub brokers can become bottlenecks at scale. Browser support for WebSockets is universal, but SSE has limitations in older clients. Plan for graceful degradation and fallback mechanisms.