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FilledSmallSquare FromPackedArray[expr] unpacks expr so that its internal representation is not a packed array.

FilledSmallSquare Using FromPackedArray will not change results generated by Mathematica, but can reduce speed of execution and increase memory usage.

FilledSmallSquare If expr is not a packed array, FromPackedArray[expr] returns expr unchanged.

FilledSmallSquare See also: ToPackedArray, PackedArrayQ, ByteCount.