[GHC] #14208: Performance with O0 is much better than the default or with -O2, runghc performs the best

[GHC]

#14208: Performance with O0 is much better than the default or with -O2, runghc
performs the best
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        Reporter:  harendra          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 Harendra, have you read my post about how this part of GHC works? It might
 be useful for you or at least useful to point other people to. Your
 tickets have good examples in, I will try to get back to them once I am
 back from holiday.

 http://mpickering.github.io/posts/2017-03-20-inlining-and-
 specialisation.html

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14208#comment:18>
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