Each point (rectangle) represents the results of a solver configuration on
an instance aggregated by the specified measure. The solver configurations and
instances are sorted by this measure over all results (e.g. the par10 of a
solver configuration over all its jobs, and the par10 of all results for an instance).
All values are log10 scaled. This plot can be interpreted as follows:
A mostly vertical gradient from black to white indicates that the solver
configurations can be clearly distinguished in terms of their performance.
A mostly horizontal gradient indicates that the different solver configurations
perform similar on the instances.