So what is this 244KB JS taking 1300ms to execute on the simulated G4 actually doing? It contains mostly parts of the Closure Library (https://developers.google

So what is this 244KB JS taking 1300ms to execute on the simulated G4 actually doing? It contains mostly parts of the Closure Library (https://developers.google.com/closure/library/ https://developers.google.com/closure/library/).