[GHC] #1600: Optimisation: CPR the results of IO

[GHC]

#1600: Optimisation: CPR the results of IO
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        Reporter:  simonmar          |                Owner:
            Type:  task              |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  6.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8598             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by simonpj):

 * cc: osa1 (added)


Comment:

 I wonder why there's a consistent 2% increase in binary size; I was not
 expecting that.

 I have not looked at the code... when you are ready, seeing it all as one
 Phab diff (not lots) would be helpful.

 Omer may be thinking about nested CPR, and has an implementation on a
 branch somewhere.   This is a particular instance of nested CPR, so it'd
 be good to sync up with him (cc'd).

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1600#comment:55>
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