[GHC] #7596: Opportunity to improve CSE

[GHC]

#7596: Opportunity to improve CSE
-------------------------------------+------------------------------------
        Reporter:  simonpj           |            Owner:  simonpj
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  7.6.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
-------------------------------------+------------------------------------

Comment (by nomeata):

 With aggressive floating out bounded by multi-way-cases, the changes are
 less dramatic:
 {{{
         Program           Size    Allocs   Runtime   Elapsed  TotalMem
 --------------------------------------------------------------------------------
         knights          +0.5%    -23.1%      0.01      0.01      0.0%
         mandel2          +0.4%    +46.6%      0.00      0.00      0.0%
 --------------------------------------------------------------------------------
             Min          +0.3%    -23.1%    -20.2%    -19.7%    -20.0%
             Max          +1.3%    +46.6%     +1.9%     +1.9%     +3.6%
  Geometric Mean          +0.5%     -0.0%     -4.1%     -4.2%     -0.3%
 }}}
 Will investigate what happened with mandel2 now.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7596#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler