JSON

Builds a json report as follows (though it does not format this nicely):

report

[
   {
      'max_time' => '3.50475311279297e-05',
      'total_runs' => 4,
      'min_time' => '2.09808349609375e-05',
      'avg_time' => '2.55107879638672e-05',
      'name' => 'true',
      'total_time' => '0.000102043151855469',
      'times' => [
                   '2.40802764892578e-05',
                   '2.09808349609375e-05',
                   '3.50475311279297e-05',
                   '2.19345092773438e-05'
                 ]
    },
]