[Haskell-cafe] Why does this program eat RAM?

Udo Stenzel u.stenzel at web.de
Tue Sep 5 07:05:49 EDT 2006

Bulat Ziganshin wrote:
> Data.HashTable may be a faster alternative for Map (if ordering isn't
> required)

Or it may not.  Finding a good hash function for the words John is
counting, is a challenge itself.  Finding a good one that doesn't look
at each character at least once, might be outright impossible.  That
means, a hash table cannot do significantly less work than the
appropriate data structure, which is a trie, aka Data.StringMap.

Q:      Why do mountain climbers rope themselves together?
A:      To prevent the sensible ones from going home.
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