[GHC] #7436: Derived Foldable and Traversable instances become extremely inefficient due to eta-expansion

[GHC]

#7436: Derived Foldable and Traversable instances become extremely inefficient due
to eta-expansion
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        Reporter:  shachaf                  |            Owner:
            Type:  bug                      |           Status:  merge
        Priority:  normal                   |        Milestone:  7.6.3
       Component:  Compiler                 |          Version:  7.6.1
      Resolution:  fixed                    |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:  perf/should_runt/T7436   |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by carter):

 was this merged into 7.6?
 else wise, should it be merged into 7.8/head?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7436#comment:23>
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