public static int SIMDSum(this ReadOnlySpan <int> array)
        {
            int length           = Vector <int> .Count * 32;
            int vectorizedLength = (array.Length / length) * length;

            Span <int> temp   = stackalloc int[length];
            int        result = 0;

            for (int i = 0; i < vectorizedLength; i += length)
            {
                temp.AddAssign(array.Slice(i, length));
            }

            for (int i = 0; i < length; i++)
            {
                result += temp[i];
            }

            for (int i = vectorizedLength; i < array.Length; i++)
            {
                result += array[i];
            }

            return(result);
        }