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How is the latency when the app is open and waiting to receive a reply?

From one of the diagrams it sounds like the API requests a delta update if it receives a push notification, but if the user has disabled push notifications, will the client still know to request an update? Also receiving a notification and then using a new connection to request an update is still slower than something like a web socket/long poll connection where new updates are immediately pushed to clients. Would love to hear how this works.



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