This new --baseline flag can be used to indicate which of the data sets
is to be used as the baseline to compare against, instead of picking the
first one.

'panel.margin' was renamed 'panel.spacing' in verstion 2.2.0 of ggplot2.

See https://github.com/tidyverse/ggplot2/blob/v2.2.0/NEWS.md#themes

Pierre Langlois authored Feb 04, 2019 and Jacob Bramley committed Feb 04, 2019

Displaying the facet would depend on the 'Column' column being
present. Instead, initialize the column with empty strings if it doesn't exist
and only display the facet if all values are empty.

Pierre Langlois authored Feb 01, 2019 and Jacob Bramley committed Feb 01, 2019

Instead of having a global --bigger-is-better/--smaller-is-better setting, we
can now have a per-row setting with a new optional 'Direction' column in the CSV
format. It allows plotting different values in the same graph, such as code
size (bigger is better) and time spent (smaller is better).

To clean things up, we also introduce a --direction flag that can be set to
either 'left' or 'right' and indicates which way the biggest values should be
plotted. As a result, we have the following equivalent flags:

--bigger-is-better --> --direction=right
--smaller-is-better --> --direction=left

This was deprecated, and removed from ggplot2 2.0.0.

The built-in 'percent' function occasionally produces NaNs when given negative
inputs. It looks like this has been fixed in more recent versions of R, but the
workaround is simple.

In particular, the graphs are useful for analysing JavaScript benchmark results.
JavaScript benchmarks often exhibit bimodal (or otherwise noisy) behaviour, and
take a very long time to run, so simply examining the mean of a set of 10 runs
tends to be misleading. This tool tries to plot every result in a way such that
trends and patterns can be spotted.