[GHC] #13745: Investigate compile-time regressions in regex-tdfa-1.2.2

[GHC]

#13745: Investigate compile-time regressions in regex-tdfa-1.2.2
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      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 RyanGlScott):

 Found it. The other culprit is commit
 6eb52cfc2e31df2561860f43d41766464ccfe8af (Improve SetLevels for join
 points):

 {{{
 Commit 871b63e4ea95d4c516d31378d0475167e75caa01 (Improve pretty-printing
 of types)
 -----
 real    0m13.918s
 user    0m13.708s
 sys     0m0.192s

 Commit 6eb52cfc2e31df2561860f43d41766464ccfe8af (Improve SetLevels for
 join points)
 -----
 real    0m19.008s
 user    0m18.804s
 sys     0m0.188s
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13745#comment:5>
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