[GHC] #3655: Performance regression relative to 6.10

[GHC]

#3655: Performance regression relative to 6.10
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    Reporter:  simonmar                  |        Owner:                  
        Type:  run-time performance bug  |       Status:  new             
    Priority:  high                      |    Milestone:  6.12.2          
   Component:  Compiler                  |      Version:  6.10.4          
    Severity:  normal                    |   Resolution:                  
    Keywords:                            |   Difficulty:  Unknown         
    Testcase:                            |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple          |  
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Comment (by simonmar):

 Strange things are afoot.  With the STABLE buildbot build, this program
 only allocates 3.5GB and runs in 8.5s.  Simon PJ's HEAD build has similar
 behaviour, but none of the other HEAD builds I have tried do - they all
 behave similarly to the 6.13 results above.

 We continue to investigate with `-ticky`.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3655#comment:1>
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