Numeric Haskell: A Vector Tutorial - HaskellWiki

Vector is a Haskell library for working with arrays. It has an emphasis on very high performance through loop fusion, whilst retaining a rich interface. The main data types are boxed and unboxed arrays, and arrays may be immutable (pure), or mutable. Arrays may hold Storable elements, suitable for passing to and from C, and you can convert between the array types. Arrays are indexed by non-negativ