[GHC] #10108: Dramatic slowdown with -O2 bytestream and list streams combined.

[GHC]

#10108: Dramatic slowdown with -O2 bytestream and list streams combined.
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        Reporter:  Truman            |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.8.4
      Resolution:  invalid           |                Keywords:
Operating System:  Linux             |            Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |               Test Case:
      Blocked By:                    |  break_in.hs
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by rwbarton):

 (By the way, this was an issue of no optimizations versus -O2 (or -O), not
 -O versus -O2.)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10108#comment:5>
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