Greg Buchholz wrote:
> You'd probably get a faster program with Unboxed arrays and
> unsafeAccumArray.
>
Yeah, its about 20x faster unboxed and unsafe...
import Data.Array.Base
main = print $ quick_func $ take 1000000 $ cycle [1,2,3,1,2,9,1,9]
quick_func :: [Int] -> [(Int,Int)]
quick_func is = assocs f
where
f :: UArray Int Int
f = unsafeAccumArray (+) 0 (1,12) [(i, 1::Int) | i<-is]
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