http://d.puremagic.com/issues/show_bug.cgi?id=10239

           Summary: Efficient bitcount for std.bitmanip.BitArray
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: bearophile_hugs@eml.cc


--- Comment #0 from bearophile_hugs@eml.cc 2013-06-02 05:10:04 PDT ---
Split from Issue 4124.

I suggest to add to BitArray a method to count set bits. There are _very_ efficient algorithms to do this. Optionally such member function should have two arguments to specify the start and ending points to count the bits into.

See also Issue 10238

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