patch applied (ghc-6.8/packages/base): Fix performance regression: re-instate -funbox-strict-fields

[Ian Lynagh]

Mon Oct 29 08:07:30 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * Fix performance regression: re-instate -funbox-strict-fields
  Yikes!  While investigating the increase in code size with GHC 6.8
  relative to 6.6, I noticed that in the transition to Cabal for the
  libraries we lost -funbox-strict-fields, which is more or less
  depended on by the IO library for performance.  I'm astonished that we
  didn't notice this earlier!
  
  To reduce the chances of this happening again, I put
  -funbox-strict-fields in the OPTIONS_GHC pragma of the modules that
  need it.  {-# UNPACK #-} pragmas would be better, though.

    M ./Data/HashTable.hs -1 +1
    M ./Data/Typeable.hs -1 +1
    M ./GHC/Arr.lhs -1 +1
    M ./GHC/IOBase.lhs -1 +1