[GHC] #11989: Performance bug reading large-exponent float without explicit type

[GHC]

#11989: Performance bug reading large-exponent float without explicit type
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        Reporter:  bpearlmutter      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Runtime           |            Test Case:  1e1000000 ::
  performance bug                    |  (RealFloat a => a)
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by j.waldmann):

 This happens with 8-rc4 as well.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11989#comment:1>
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