[GHC] #9476: Implement late lambda-lifting

[GHC]

#9476: Implement late lambda-lifting
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        Reporter:  simonpj           |                Owner:  sgraf
            Type:  feature request   |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  7.8.2
      Resolution:  fixed             |             Keywords:  LateLamLift
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8763 #13286      |  Differential Rev(s):  Phab:D5224
       Wiki Page:  LateLamLift       |
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Comment (by simonpj):

 >  what matters is that the sampled maximum residency for default was
 lower than allow-cg (192 vs. 196MB)

 Interesting.  So the (fairly complicated) closure-growth analysis busy us
 only 2% reduction in residency.  That raises the question of whether the
 gain is worth the pain.  We should explore that in the paper -- and of
 course measure more programs.

 We don't want a tricky analysis that doesn't pay its way.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9476#comment:72>
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