public static void main(String[] args) {
        double time = new MatrixDotProductBenchmark().benchmark(10000, matrix(10, 55, TensorType.Dimension.Type.mapped), TensorType.Dimension.Type.mapped);
        System.out.printf("Matrixes, 10*55 size matrixes. Time per sum(join): %1$8.3f ms\n", time);
    }
Microbenchmark of a "dot product" of two mapped rank 2 tensors

@author bratseth
vespajlib/src/test/java/com/yahoo/tensor/MatrixDotProductBenchmark.java