I don't have a good answer to that, and I unable to reliably solve this type of problem, which is one reason I am posting around on haskell cafe hoping to accumulate wisdom.
Here for instance I think I did t = last . take (10^6) $ repeat $ S.empty which doesn't blow up, and by process of elimination figured the process must be in iterate. I then looked at iterate by writing myiterate (could have also copied from hackage prelude) and thought about it until the answer (well, an answer, maybe not the best one) came myiterate f x = x : myiterate f (f x) In general, I feel like I don't do very well solving these types of problems. Am 17. Juli 2009 08:47 schrieb Matthias Görgens <matthias.goerg...@googlemail.com>: > Thomas, if you did no know, where to look for `lazy-memory-hole', say > in your first example, how would you go about solving that puzzle > systematically with a Profiler (or other tools)? > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe