Default unique(x$test_group).
The default behaviour is select the groups from your benchmark results.
blas_optimize
Logical. Default The default behaviour
is to compare your results with results that use the same
blas_optimize setting. To use all results, set to NULL.
log
By default the y axis is plotted on the log scale. To change, set the
the argument equal to the empty parameter string, "".
...
Arguments to be passed to other downstream methods.