I have posted previous knucleotide program, it is fast on 64 bit but

very slow on 32 bit.

I cannot install 32 bit ghc to test it so I can only guess is that

cause is use of Int64 for hash and HashMap array indexing.

What bothers me is that it that much slower , and I guess

that array indexing of 64 bit int where native index is 32 bit

is culprit.

Am I right? If I make Int index of array it will be fast on

32 bit platform too?

I cannot imagine that hashing to 64 bit int is culprit rather

array indexing as I guess that every array access

requires indirect access on 32 bit platform?

64 bit :

19.80 secs

32 bit:

91.01 secs ;(

I really like Haskell, but Im frustrated as how inpredictable it is.

Im programming from 1983' but found Haskell as much more difficult

to program efficiently than C++.

In C++ whatever lousy program I write it performs decently,

but not so in Haskell. It requires much deeper knowledge than

c++.