[GHC] #4965: 60% performance regression in continuation-heavy code between 6.12 and 7

[GHC]

#4965: 60% performance regression in continuation-heavy code between 6.12 and 7
---------------------------------+------------------------------------------
    Reporter:  bos               |        Owner:                         
        Type:  bug               |       Status:  new                    
    Priority:  normal            |    Milestone:                         
   Component:  Compiler          |      Version:  7.0.1                  
    Keywords:                    |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
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Comment(by bos):

 Simon, your patches from today do indeed improve the performance:

 {{{
 ./AesonParse7new 1000 json-data/twitter100.json
 json-data/twitter100.json:
   1000 good, 2.284175s
 }}}

 That brings us from a 60% regression to 25%.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4965#comment:3>
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