Data.HashTable performance

[Frank Kuehnel]

Out of curiosity, I've tested a few Hashtable implementations:

http://zufaellige-reflektion.blogspot.com/2011/04/associative-arrays-showdown.html

Are there any clues why Haskell's Data.HashTable doesn't perform better?
I would have expected a similar performance like with F# on the Mono 2.0 platform.

Thanks,
Frank

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