[GHC] #6104: Regression: space leak in HEAD vs. 7.4

[GHC]

#6104: Regression: space leak in HEAD vs. 7.4
---------------------------------+------------------------------------------
    Reporter:  simonmar          |       Owner:  igloo                       
        Type:  bug               |      Status:  new                         
    Priority:  highest           |   Milestone:  7.6.1                       
   Component:  Compiler          |     Version:  7.5                         
    Keywords:                    |          Os:  Unknown/Multiple            
Architecture:  Unknown/Multiple  |     Failure:  Compile-time performance bug
  Difficulty:  Unknown           |    Testcase:                              
   Blockedby:                    |    Blocking:                              
     Related:                    |  
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Comment(by igloo):

 Most of the regression comes from this patch:
 {{{
 commit 980372f357667c1ba63b28acbf5798826890b7a5
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Wed May 9 16:22:49 2012 +0100

     Re-do the "function application discount" (fixes Trac #6048)
 }}}
 (the SimplCont patches also made things a bit worse, but I haven't looked
 into that at all).

 I think that the problem is more/bigger inlinings, rather than a space
 leak in GHC itself. I'll attach `CopyFile.hs`, and `before.txt` and
 `after.txt` showing the interface files before and after this patch is
 applied.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6104#comment:5>
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