https://issues.dlang.org/show_bug.cgi?id=20887

          Issue ID: 20887
           Summary: Improve speed of std.digest.digest!(Hash, Range) on
                    non-array ranges
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: n8sh.secondary@hotmail.com

Speed up `std.digest.digest!(Hash, Range)` on non-array ranges by chunking the data. I would have liked to use something like `std.stdio.File.byChunk(ubyte[])` but I didn't find anything equivalent. `std.algorithm.iteration.chunkBy` doesn't work for this purpose.

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