| C | ↘ | D | DecisionTree got worse |
| ⇢ | A | DecisionTree::arrayCountValues() added | |
| ⇢ | A | DecisionTree::setInstanceColumnTypes() added | |
| ⇢ | A | DecisionTree::getInstanceColumnTypes() added | |
| A | ↘ | B | DecisionTree::isCategoricalColumn() got worse |
| B | ↘ | C | DecisionTree::getBestSplit() got worse |
| B | ↘ | C | DecisionTree::train() got worse |
| A | ↘ | D | DecisionTreeLeaf::evaluate() got worse |