[GHC] #12964: Runtime regression to RTS change

[GHC]

#12964: Runtime regression to RTS change
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        Reporter:  nomeata           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Runtime System    |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by nomeata):

 * priority:  highest => normal


Comment:

 Further measurements show that the wobbling of `hidden` correlates with
 changes to the RTS, but it also changed due to
 changeset:514c01eec5f2b23f278c29b61345dce6c37900f1. There seems to be a
 performance cliff of sorts, which is very annoying when trying to keep
 tabs on performance, but probably not a high priority blocker for the
 release, especially as it is likely not a simple bug introduced by any
 single commit.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12964#comment:2>
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