[GHC] #4005: paraffins: slowdown of ca 2 with -O2

[GHC]

#4005: paraffins: slowdown of ca 2 with -O2
-----------------------------+----------------------------------------------
    Reporter:  hwloidl       |        Owner:  igloo                             
        Type:  bug           |       Status:  new                               
    Priority:  high          |    Milestone:  6.12.3                            
   Component:  Compiler      |      Version:  6.12.1 RC1                        
    Keywords:  optimisation  |   Difficulty:                                    
          Os:  Linux         |     Testcase:  see attached (compile and run) log
Architecture:  x86           |      Failure:  Runtime performance bug           
-----------------------------+----------------------------------------------

Comment(by simonmar):

 Oh, I should mention that I tried `-fno-cse` and `-fno-full-laziness`, but
 neither made any difference.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4005#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler