returning Nil on empty IntMap as done in corresponding functions for Map #609
| Job | Run time |
|---|---|
| 11m 42s | |
| 11m 30s | |
| 11m 25s | |
| 11m 57s | |
| 11m 40s | |
| 13m 1s | |
| 12m 29s | |
| 12m 36s | |
| 13m 3s | |
| 9m 31s | |
| 9m 32s | |
| 2h 8m 26s |
| Job | Run time |
|---|---|
| 11m 42s | |
| 11m 30s | |
| 11m 25s | |
| 11m 57s | |
| 11m 40s | |
| 13m 1s | |
| 12m 29s | |
| 12m 36s | |
| 13m 3s | |
| 9m 31s | |
| 9m 32s | |
| 2h 8m 26s |