runtime effect of polymorphic Array.!

Of course (!) is polymorphic (!) :: Ix a => Array a b -> a -> b but on the other hand the GHC manual says Overloaded functions are not your friend: Haskell's overloading (using type classes) is elegant, neat, etc., etc., but it is death to performance if left to linger in an inner loop. I assume (!) is inlined and specialized by GHC, but what does hugs do? Does it build and pass around dictionaries all the time I index an array? (In my case, I am forced to use (run)hugs.) Just curious, -- -- Johannes Waldmann ---- http://www.informatik.uni-leipzig.de/~joe/ -- -- joe@informatik.uni-leipzig.de -- phone/fax (+49) 341 9732 204/252 --