Use checked math for _new_from_parent (#2859)
#410
| Job | Run time |
|---|---|
| 14m 0s | |
| 26m 48s | |
| 40m 48s |
_new_from_parent (#2859)
#410
| Job | Run time |
|---|---|
| 14m 0s | |
| 26m 48s | |
| 40m 48s |