[GHC] #6082: Program compiled with 7.4.1 runs many times slower than compiled with 7.2.2

[GHC]

#6082: Program compiled with 7.4.1 runs many times slower than compiled with 7.2.2
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  Reporter:  gchrupala                |          Owner:  pcapriotti      
      Type:  bug                      |         Status:  closed          
  Priority:  high                     |      Milestone:  7.4.3           
 Component:  libraries (other)        |        Version:  7.4.1           
Resolution:  wontfix                  |       Keywords:                  
        Os:  Unknown/Multiple         |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug  |     Difficulty:  Unknown         
  Testcase:                           |      Blockedby:                  
  Blocking:                           |        Related:                  
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Changes (by simonmar):

  * status:  new => closed
  * resolution:  => wontfix


Comment:

 `unsafeFreeze` and `unsafeThaw` need to be imported from
 `Data.Array.Unsafe` now, as the deprecation warning states.  If you import
 them from the new location then the RULEs will fire as expected.

 The problem boils down to a lack of the feature requested in #4879:
 deprecating exports, so I've raised the priority of that ticket.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6082#comment:7>
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