For comparison, is there info on how Facebook is using MQTT for chat? EDIT: here's something, but not on backend architecture: https://www.facebook.com/notes/fa

For comparison, is there info on how Facebook is using MQTT for chat? EDIT: here's something, but not on backend architecture: https://www.facebook.com/notes/facebook-engineering/building-facebook-messenger/10150259350998920 https://www.facebook.com/notes/facebook-engineering/building...