[GHC] #15131: Speed up certain Foldable NonEmpty methods

[GHC]

#15131: Speed up certain Foldable NonEmpty methods
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Core Libraries    |              Version:  8.2.2
      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):  Phab:D4677
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by dfeuer):

 * status:  new => patch
 * differential:   => Phab:D4677


Comment:

 I've put together a patch, Phab:D4677, to make `foldr1` decent and
 `length` slightly better. I'll wait for feedback from mpickering and/or
 nomeata before mucking about with inlining.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15131#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler