Results on a Dell XPS 13 9380 laptop.

Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz (up to 4.6GHz),
16GB of RAM.  MATLAB R2019a.  Ubuntu 18.04.  GraphBLAS and
the mexFunction interface compiled with gcc 7.5.0.  The CPU
has 4 hardware cores, and 4 threads were used (the default
when running OpenMP inside MATLAB).

