index % time    self  children    called     name
                                                 <spontaneous>
[1]    100.0    0.00    9.23                 main [1]
                9.21    0.00       1/1           mmul [2]
                0.02    0.00       2/2           randmatrix [3]
-----------------------------------------------
                9.21    0.00       1/1           main [1]
[2]     99.8    9.21    0.00       1         mmul [2]
-----------------------------------------------
                0.02    0.00       2/2           main [1]
[3]      0.2    0.02    0.00       2         randmatrix [3]
-----------------------------------------------