\ ------ Cons cell memory ------ {{{
-1000 constant N
+10000 constant N
create car-cells N allot
create car-type-cells N allot
create cdr-cells N allot
begin
2dup cdr 2dup nil objeq? false =
while
- -2rot car over ( nextbody env exp env )
+ -2rot car 2over ( nextbody env exp env )
eval
2drop \ discard result
2swap ( env nextbody )