MRG: upgrade sig overlap and sig subtract to load more than JSON signatures
#6678
| Job | Run time |
|---|---|
| 11m 10s | |
| 9m 17s | |
| 11m 44s | |
| 6m 53s | |
| 7m 56s | |
| 6m 47s | |
| 53m 47s |