Compares two
Result Result objects for order. Results
are ordered by benchmark id, class id, task id, and
then data set id.
-1 if o1 < o2; returns0 if o1 == o2; returns1 if o1 > o2; throws: NullPointerException - if o1 is null;if o2 is null. throws: ClassCastException - if o1 is not of class Result Result;if o2 is not of class Result Result.