[GHC] #9979: Performance regression GHC 7.8.4 to GHC HEAD

[GHC]

#9979: Performance regression GHC 7.8.4 to GHC HEAD
-------------------------------------+-------------------------------------
              Reporter:  alanz       |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.11
              Keywords:  regression  |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
 Testing with HEAD 023439980f6ef6ec051f676279ed2be5f031efe6

 Baseline: GHC 7.8.4

 {{{
 ghc-config 7.8.4
 cabal unpack haskell-src-exts
 cd haskell-src-exts-1.16.0.1/
 cabal install --dependencies-only
 time (cabal clean && cabal build)

 real    2m38.696s
 user    5m17.256s
 sys     3m44.732s
 }}}

 Test : GHC HEAD

 {{{
 ghc-config 7.11.20150112

 cabal install --dependencies-only
 time (cabal clean && cabal build)

 real    3m35.027s
 user    6m45.664s
 sys     5m15.220s
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9979>
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