Uses ggplot2 to produce a more legible graph of microbenchmark timings
# S3 method for microbenchmark
autoplot (object, ...,
y_max = max(by(object$time, object[["expr"]], uq)) * 1.05)
A microbenchmark object
Ignored
The upper limit of the y axis (defaults to 5 percent more than the maximum value)
A ggplot2 plot