[GHC] #8662: GHC does not inline cheap inner loop when used in two places

[GHC]

#8662: GHC does not inline cheap inner loop when used in two places
--------------------------------------------+------------------------------
        Reporter:  nh2                      |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:
       Component:  Compiler                 |          Version:  7.6.3
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
--------------------------------------------+------------------------------

Comment (by nh2):

 Why should it not do this automatically?

 It is a pretty cheap function (from my human-not-compiler perspective).

 Why do you need to set such a big threshold to get it inlined? Is there a
 page that describes how these thresholds work?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8662#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler