[GHC] #4184: Squirrelly inliner behaviour leads to 80x slowdown

[GHC]

#4184: Squirrelly inliner behaviour leads to 80x slowdown
--------------------------------------+-------------------------------------
  Reporter:  bos                      |          Owner:                  
      Type:  bug                      |         Status:  closed          
  Priority:  normal                   |      Milestone:  7.2.1           
 Component:  Compiler                 |        Version:  6.12.1          
Resolution:  invalid                  |       Keywords:                  
  Testcase:                           |      Blockedby:                  
Difficulty:                           |             Os:  Unknown/Multiple
  Blocking:                           |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug  |  
--------------------------------------+-------------------------------------

Comment(by bos):

 Under GHC 6.12, as comment #3 mentions, the INLINE doesn't really help
 when enabled. It works for a trivial test case, so a tiny benchmark gets
 sped back up, but in an application, the slowdown does not go away (i.e.
 it looks like the inlining doesn't actually take place).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4184#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler