Immutability doesn't mean large amounts of copying. You can exploit the fact that things will never change in clever ways. http://hypirion.com/musings/understa

Immutability doesn't mean large amounts of copying. You can exploit the fact that things will never change in clever ways. http://hypirion.com/musings/understanding-persistent-vector-pt-1 http://hypirion.com/musings/understanding-persistent-vector-...