> Presumably React Native apps do something to that extent? Not in the background they don't, no. > Or, if they don't, whatever optimization they use They do

> Presumably React Native apps do something to that extent? Not in the background they don't, no. > Or, if they don't, whatever optimization they use They don't have one. There is no optimization they can do to run JS in the background. Push notifications in a React Native app either use native code or rely on declarative payloads sent from the server.