[GHC] #8655: Evaluate know-to-terminate-soon thunks

[GHC]

#8655: Evaluate know-to-terminate-soon thunks
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        Reporter:  nomeata           |            Owner:  nomeata
            Type:  task              |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by nomeata):

 Indeed, after running before and after again, and making sure the machine
 does nothing else in that time, I get
 {{{
             Min          -0.0%     -0.1%     -2.2%     -1.6%     -1.3%
             Max          +0.0%     +0.0%     +3.6%     +3.6%     +9.7%
  Geometric Mean          -0.0%     -0.0%     +0.2%     +0.3%     +0.1%
 }}}
 So probably it’s not worth it.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8655#comment:3>
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