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Realtime Systems: Polling, WebSockets, SSE, and Pub/Sub
The question that started it all How does WhatsApp deliver a message instantly? You send a message, and it appears on your friend's phone within a fraction of a second — no refresh button, no waiting.
#realtime#web#web-development#development#full-stack#chai#chaiaurcode#websockets#pubsub#sse#websocket#polling#webdev#dev#devlopment#chaicode#blogging
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