Add a way to way to wait for process groups. #3270
| Job | Run time |
|---|---|
| 2m 10s | |
| 25s | |
| 39s | |
| 1m 59s | |
| 1m 9s | |
| 2m 16s | |
| 17s | |
| 1m 35s | |
| 38s | |
| 44s | |
| 49s | |
| 1m 4s | |
| 56s | |
| 1m 6s | |
| 43s | |
| 1m 12s | |
| 57s | |
| 4m 19s | |
| 55s | |
| 1m 11s | |
| 1m 2s | |
| 1m 15s | |
| 1m 10s | |
| 1m 12s | |
| 1m 13s | |
| 1m 11s | |
| 56s | |
| 1m 4s | |
| 59s | |
| 1m 9s | |
| 1m 13s | |
| 1m 4s | |
| 3m 46s | |
| 1m 11s | |
| 1m 12s | |
| 1m 14s | |
| 1m 6s | |
| 52s | |
| 56s | |
| 57s | |
| 49m 46s |