[GHC] #13220: Performance regressions in testsuite from join points

[GHC]

#13220: Performance regressions in testsuite from join points
-------------------------------------+-------------------------------------
        Reporter:  lukemaurer        |                Owner:  lukemaurer
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by rwbarton):

 Replying to [comment:30 simonpj]:
 > BTW, do you withdraw comment:25?

 Well, the addition of that `ensureEqTys` did contribute a couple percent
 to the total compilation time (with `-dcore-lint`) in my test. If it's
 useful we can keep it; I don't understand what kind of substitution
 `le_subst` Core Lint is carrying around, so it's unclear to me whether
 this is actually testing something about the program being compiled or
 testing the consistency of Core Lint itself.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13220#comment:32>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler