> Does the CL spec require the implementation to use linked lists or merely to behave as if it were a linked list? "list: a chain of conses in which the car of

> Does the CL spec require the implementation to use linked lists or merely to behave as if it were a linked list? "list: a chain of conses in which the car of each cons is an element of the list, and the cdr of each cons is either the next link in the chain or a terminating atom." -- https://www.lispworks.com/documentation/HyperSpec/Body/26_glo_l.htm#list https://www.lispworks.com/documentation/HyperSpec/Body/26_gl... Interpret that as you will. But what "world of difference" optimizations are you suggesting here? Give an example of a significant optimization at the implementation level that preserves cons semantics.