Why One Developer Switched From WebSockets to SSE for Live Dashboards

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While building a Node.js dashboard that needed live updates without page refreshes, the author initially assumed WebSockets were the right tool. On closer analysis, the dashboard only required one-way data flow from server to browser, so the bidirectional capability of WebSockets went unused. Server-Sent Events run over standard HTTP, use the browser's native EventSource API, and avoid the manual lifecycle and heartbeat management that WebSockets demand. The article notes SSE integrates easily with existing proxies and load balancers, benefits from HTTP/2 multiplexing, and handles reconnection natively. The author concludes that protocol choice should follow the direction of data flow rather than update frequency alone.

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Network Latency Could Corrupt Robot Training Data, Researchers Argue

A recent paper introduces K-AoI, a metric that measures how closely a digital twin stays synchronized with the physical scene during remote robot operation. It combines data age with spatial alignment rather than relying on delay alone. The authors argue that remote teleoperation sessions produce recorded demonstrations used to train future autonomous robots, so frames with stale views may be unreliable. The piece also notes that trained human annotators must review such footage frame by frame before it becomes usable training data.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

NLnet Labs patches four stack overwrite flaws in NSD DNS server version 4.15.3

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