[GHC] #9646: Simplifer non-determinism leading to 8 fold difference in run time performance

[GHC]

#9646: Simplifer non-determinism leading to 8 fold difference in run time
performance
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        Reporter:  erikd             |                Owner:
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Test Suite        |              Version:  7.8.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Runtime           |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2009
       Wiki Page:                    |
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Comment (by Erik de Castro Lopo <erikd@…>):

 In [changeset:"220a0b934c71a8844a14dd8cd67fa0e23f807182/ghc"
 220a0b93/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="220a0b934c71a8844a14dd8cd67fa0e23f807182"
 Add test for #9646

 Test Plan: Test that it passes git HEAD and fails with GHC 7.8.

 Reviewers: bgamari, hvr, austin, goldfire, thomie

 Differential Revision: https://phabricator.haskell.org/D2009

 GHC Trac Issues: #9646
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9646#comment:23>
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