Some of the languages have gotten better! Clojure, for example, has smart data structures that share elements to speed up operations and minimize copying: http

Some of the languages have gotten better! Clojure, for example, has smart data structures that share elements to speed up operations and minimize copying: http://hypirion.com/musings/understanding-persistent-vector-pt-1 http://hypirion.com/musings/understanding-persistent-vector-...