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Re: What is a lightweight language

Dorai -- pls write to Kent. Continuations almost pay for themselves if you
do a really good job on deep recursions. 

Dan -- the question is whether there is a performance cost for programs in
L minus feature F. This is called F's opportunity cost. (Okay, I do have
some funny business degree.) Closures have a cost, continuations do, set!
has a huge cost, etc. 

-- Matthias