[Issue 12446] New: std.parallelism.amap prefer iteration to indexing

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12446

           Summary: std.parallelism.amap prefer iteration to indexing
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: safety0ff.bugz at gmail.com
        ReportedBy: safety0ff.bugz at gmail.com


--- Comment #0 from safety0ff.bugz <safety0ff.bugz at gmail.com> 2014-03-23 13:36:07 PDT ---
Currently std.parallelism.amap uses the random access range primitives instead
of the input range primitives to traverse the per-thread slices.

This matters when random access is more expensive than iteration.

Iteration, if properly implemented, should always at least as fast as indexing.

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