[GHC] #6166: Performance regression in mwc-random since 7.0.x

[GHC]

#6166: Performance regression in mwc-random since 7.0.x
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        Reporter:  bos                      |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  high                     |        Milestone:  7.6.2
       Component:  Compiler                 |          Version:  7.4.2
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:  x86_64
 Type of failure:  Runtime performance bug  |  (amd64)
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by simonpj):

 Thank you for a stripped-down case.  Can you explain exactly how to
 demonstrate the bug with this test program?  Ie "Try X and program runs in
 2s; make trivial change to Y and it takes 10s".  Or whatever.

 Does it need `mwc-random` in all its glory, or would it be possible to
 make a standalone test case?

 Simon

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6166#comment:8>
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