[GHC] #9872: Runing type functions is too slow

[GHC]

#9872: Runing type functions is too slow
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              Reporter:  simonpj     |            Owner:
                  Type:  bug         |           Status:  closed
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:  fixed       |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by cactus):

 Just to put some numbers on the improvement processing time-wise, here's
 an unscientific test run of all three tests, using GHC 7.8.3 and GHC
 a225c70e00586e2f38a0e27fae698324ae81b006 built in `perf` mode (rounded to
 tenth of seconds because the whole thing is unscientific anyway, just a
 single run of `ghc --make` on the three source files)

 ||          ||= GHC 7.8.3 =||= GHC a225c70 =||
 ||= T9872a =||        45.5s||             7s||
 ||= T9872b =||        35.7s||           6.5s||
 ||= T9872c =||        45.3s||           7.5s||

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9872#comment:18>
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