[GHC] #11735: Optimize coercionKind

[GHC]

#11735: Optimize coercionKind
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        Reporter:  goldfire          |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      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 Simon Peyton Jones <simonpj@…>):

 In [changeset:"db5a4b83b14bf4f1adb417b7664347fdaf637fd6/ghc"
 db5a4b83/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="db5a4b83b14bf4f1adb417b7664347fdaf637fd6"
 Re-center improved perf for T3064

 There's a 6% reduction in allocation on T3064.  I think it's due to

   commit e4ab65bd57b2c39f4af52879654514bb6d5b42a0
   Author: Tobias Dammers <tdammers at gmail.com>
   Date:   Wed Jan 31 21:39:45 2018 -0500

       Optimize coercionKind (Trac #11735)

 I'm not certain -- but, hey, it's good news
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11735#comment:67>
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