[GHC] #1794: map has strange unfolding, code blowup and performance loss

[GHC]

#1794: map has strange unfolding, code blowup and performance loss
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    Reporter:  simonmar  |        Owner:  simonmar        
        Type:  merge     |       Status:  new             
    Priority:  normal    |    Milestone:  6.8.1           
   Component:  Compiler  |      Version:  6.6.1           
    Severity:  normal    |   Resolution:                  
    Keywords:            |   Difficulty:  Moderate (1 day)
          Os:  Unknown   |     Testcase:                  
Architecture:  Unknown   |  
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Changes (by simonpj):

  * owner:  simonpj => simonmar
  * type:  bug => merge

Comment:

 Fixed by
 {{{
 Mon Oct 29 11:10:56 GMT 2007  simonpj at microsoft.com
   * Substantial improvement to the interaction of RULES and inlining
 }}}

 We should do an `-O2` perf check, and then merge to stable branch. My
 nofib runs indicate a net win. I'm setting Simon M as the owner for the
 perf check.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1794#comment:2>
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