[GHC] #13193: Integer (gmp) performance regression?

[GHC]

#13193: Integer (gmp) performance regression?
-------------------------------------+-------------------------------------
        Reporter:  j.waldmann        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 That's odd

 * Can you explain how to reproduce the performance change you see?

 * Can you say how big the perf change is?

 * Can you say why you think it's tied up with "does your Integer fit into
 an Int"?

 Thanks

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13193#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler