Hi all,

Just ran into a small gotcha: I had an atom which contained a lazyseq
(e.g. (filter males world)). Later on I would be repeatedly calling
random elements from this atom, using clojure contrib rand-elt. That
was surprisingly slow. I figured out that count was the culprit.
Apparently, the lazyseq atom stayed a lazyseq atom (immutability), and
each time I called for a random element, count had to do the whole
filtering to figure out 'count'.

Is there any way that I can get a warning printed out that would let
me know when I am doing something stupid like this? for example:
(repeatedly evaluating identical full lazy sequence @world)?

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