@silentium_noxe
In some specific situation, like this:
creep.harvest("5bbcb68ad867df5e54207957");
// ... 98 lines
creep.harvest("5bbcb68ad867df5e54207957");
// "5bbcb68" been queried 100 times
const source = Game.getObjectById("5bbcb68ad867df5e54207957");
creep.harvest(source);
// ... 98 lines
creep.harvest(source);
// "5bbcb68" been queried 1 time, saved in memory
100 times more efficient in specific situation.