"constant sharing" works differently in REPL than in script ?

[shearichard at gmail.com]

Thanks for all the replies. I hadn't thought about the opportunities that exist for optimization when the whole script is there (or when compound operations are taking place) by contrast with plain old REPL ops.

I liked your code Chris demoing the different ranges in different versions. I tried to write something like that myself but you did it an awful lot better !