How Robinhood Serves Live Stock Prices to Millions (Pub-Sub & Conflation)

◇ Could this help me?

Yes. The explanation is accurate and follows the classic system design progression: polling every second does not scale, caching reduces load but not request volume, WebSockets push updates over persistent connections, pub-sub fans one price update out to many subscribers, and conflation drops intermediate ticks so slow clients only receive the latest value. General practice: worth internalizing for anyone building or reviewing an app with live or frequently changing data, even though it is a concept explainer rather than a tool tip.