[GHC] #14882: memchr#

[GHC]

#14882: memchr#
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        Reporter:  andrewthad        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4472
       Wiki Page:                    |
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Comment (by simonmar):

 I'm not all that convinced that we need `memchr#` to be a primitive.  The
 reason we brought in `memcmp` and `memcpy` were for performance in the
 `unordered-containers` package, as I recall, and they were a pretty
 important performance win in that case. Do we have any similar motivation
 for `memchr`? Where does it stop? These primitives are pretty complicated
 to implement in the compiler.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14882#comment:13>
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