[GHC] #13701: GHCi 2x slower without -keep-tmp-files

[GHC]

#13701: GHCi 2x slower without -keep-tmp-files
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        Reporter:  niteria           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by niteria):

 Douglas Wilson (new contributor) was interested in looking at this. I've
 created this to coordinate.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13701#comment:1>
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