[GHC] #7206: Implement cheap build

[GHC]

#7206: Implement cheap build
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        Reporter:  simonpj           |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  ⊥
       Component:  Compiler          |              Version:  7.4.2
      Resolution:                    |             Keywords:  FloatOut
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8763, #13422     |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Bottom line seems to be:

 * Nofib results are no better, but no worse

 * Some examples/tickets (which specifically?) really do improve.

 Conclusion: let's do it.  Ensuring that a Note gives a clear explanation,
 and points to this ticket.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7206#comment:27>
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