PROPOSAL: Put DiffArray in its own diffarray package

Hi all, Proposal: Put DiffArray in its own diffarray package http://hackage.haskell.org/trac/ghc/ticket/3370 DiffArray currently has serious performance problems; see http://hackage.haskell.org/trac/ghc/ticket/2727 and is not currently being actively maintained. However, as part of the corelib array it gives the impression that it is a "blessed" library. I propose that we split DiffArray off into its own diffarray package. This also has the advantage that it can then be maintained by a separate maintainer, if someone is interested, and it will be decoupled from GHC's major release schedule. Deadline: 26 July (2 weeks). Thanks Ian