[GHC] #5925: Add inline version of newArray#

[GHC]

#5925: Add inline version of newArray#
-------------------------------------+------------------------------------
        Reporter:  tibbe             |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  7.4.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  4258
        Blocking:                    |  Related Tickets:
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Comment (by tibbe):

 I have something that works. I will post a patch later tonight.

 Benchmark: allocating 100,000,000 `MutableArray# ()` of size 16 in a loop.

 Best out of three runs for old implementation:

 {{{
 $ time ./NewArraySlow

 real    0m2.741s
 user    0m2.696s
 sys     0m0.043s
 }}}

 Best out of three runs for new implementation:

 {{{
 $ time ./NewArrayNew

 real    0m1.490s
 user    0m1.449s
 sys     0m0.041s
 }}}

 That's almost 2x faster.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5925#comment:15>
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