HTTP Long Polling vs WebSockets

Developers should learn HTTP Long Polling when building real-time features like chat applications, live notifications, or stock tickers in environments where WebSockets are not supported or feasible, such as older browsers or restrictive network configurations meets pick websocket when you need low-latency, high-frequency, bidirectional traffic through a browser: multiplayer state sync, trading tickers, collaborative editors, where sse's one-way stream or mqtt's broker overhead don't fit. Here's our take.

HTTP Long Polling

Nice Pick

Developers should learn HTTP Long Polling when building real-time features like chat applications, live notifications, or stock tickers in environments where WebSockets are not supported or feasible, such as older browsers or restrictive network configurations

Pros

• It provides a fallback mechanism for real-time communication, ensuring compatibility and reliability in diverse deployment scenarios, though it may introduce latency and server overhead compared to more modern alternatives
• Related to: websockets, server-sent-events

Cons

• Specific tradeoffs depend on your use case

WebSockets

Pick WebSocket when you need low-latency, high-frequency, bidirectional traffic through a browser: multiplayer state sync, trading tickers, collaborative editors, where SSE's one-way stream or MQTT's broker overhead don't fit

Pros

• Skip it for simple server-push (stock ticker, notification feed): SSE rides plain HTTP, auto-reconnects, and survives corporate proxies that WebSocket's upgrade handshake can get blocked by, at a fraction of the code
• Related to: http-2, grpc

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. HTTP Long Polling is a concept while WebSockets is a protocol. We picked HTTP Long Polling based on overall popularity, but your choice depends on what you're building.

The Bottom Line

HTTP Long Polling wins

Based on overall popularity. HTTP Long Polling is more widely used, but WebSockets excels in its own space.

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