Manuel M T Chakravarty wrote:
Claus Reinke:
What do those folks working on parallel Haskell arrays think about the sequential Haskell array baseline performance?
You won't like the answer. We are not happy with the existing array infrastructure and hence have our own. Roman recently extracted some of it as a standalone package:
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/vector
In the longer run, we would like to factor our library into DPH-specific code and general-purpose array library that you can use independent of DPH.
So we have two vector libraries, vector and uvector, which have a lot in common - they are both single-dimension array types that support unboxed instances and have list-like operations with fusion. They ought to be unified, really. The main difference between these libraries and Haskell's arrays is the Ix class. So perhaps Haskell's arrays should be reimplemented on top of the low-level vector libraries? The Ix class is the root cause of the problems with optimising the standard array libraries. Cheers, Simon