[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):
       Wiki Page:                    |
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Comment (by andrewthad):

 That does work. However, I prefer to avoid using the FFI where possible.
 My reasons (which I’ll admit are not entirely compelling) are: it’s
 syntactically unappealing, it prevents optimizations (barely relevant in
 this case though), and it doesn’t work with GHCJS. I noticed from looking
 at the source for Data.Primitive.ByteArray that copyByteArray# and friends
 weren’t always provided by GHC.Prim.
 https://hackage.haskell.org/package/primitive-0.6.3.0/docs/src/Data-
 Primitive-ByteArray.html#MutableByteArray For super old GHCs, they were
 just an FFI call to memcpy. But these were eventually brought into
 GHC.Prim. I don’t know why this decision was made, but I’m glad that it
 was. I would like more ByteArray operations that correspond to manually
 super optimized standard c library functions to be made available as
 primitives.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14882#comment:2>
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