+----------------------------+-----------+-------------+
|           Class            | instances |    size     |
+----------------------------+-----------+-------------+
| java.util.HashMap$Node     | 5.000.000 | 160.000.000 |
| com.jerolba.bikey.Tuple    | 5.000.000 | 120.000.000 |
| java.util.HashMap$Node[]   |         1 |  33.554.448 |
| java.util.HashMap          |         1 |          48 |
| com.jerolba.bikey.TupleMap |         1 |          16 |
+----------------------------+-----------+-------------+