They mean the app takes data from one place, does a trivial computation, and pushed it at another place. So pushing data around is all the application does. An

They mean the app takes data from one place, does a trivial computation, and pushed it at another place. So pushing data around is all the application does. And they don't know both such places are actually faster than the trivial computation because their code runs way slower than the ones at the origin and destination.