I have posted previous knucleotide program, it is fast on 64 bit butvery slow
on 32 bit.I cannot install 32 bit ghc to test it so I can only guess is
thatcause is use of Int64 for hash and HashMap array indexing.What bothers me
is that it that much slower , and I guessthat array indexing of 64 bit int
where native index is 32 bitis culprit.Am I right? If I make Int index of array
it will be fast on32 bit platform too?I cannot imagine that hashing to 64 bit
int is culprit ratherarray indexing as I guess that every array accessrequires
indirect access on 32 bit platform?
64 bit
:http://benchmarksgame.alioth.debian.org/u64q/program.php?test=knucleotide&lang=ghc&id=119.80
secs32
bit:http://benchmarksgame.alioth.debian.org/u32q/program.php?test=knucleotide&lang=ghc&id=191.01
secs ;(
I really like Haskell, but Im frustrated as how inpredictable it is.Im
programming from 1983' but found Haskell as much more difficultto program
efficiently than C++.In C++ whatever lousy program I write it performs
decently,but not so in Haskell. It requires much deeper knowledge thanc++.
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