Use checked math for _new_from_parent (#2859)
#10653
| Job | Run time |
|---|---|
| 18m 32s | |
| 28m 3s | |
| 46m 35s |
_new_from_parent (#2859)
#10653
| Job | Run time |
|---|---|
| 18m 32s | |
| 28m 3s | |
| 46m 35s |