CoffeeScript doesn't actually create any objects you're not telling it to do so. It does return the value of the final expression, but you placed that expressio

CoffeeScript doesn't actually create any objects you're not telling it to do so. It does return the value of the final expression, but you placed that expression there to be executed. Its value will be returned and that might cause it to remain reachable for some additional time, but the value was created by your expression, not by CoffeeScript's return semantics.