use deep instead of shallow copy #1585
| Job | Run time |
|---|---|
| 15s | |
| 12s | |
| 12m 55s | |
| 15m 59s | |
| 5m 47s | |
| 10m 50s | |
| 5m 29s | |
| 5m 28s | |
| 6m 8s | |
| 7m 55s | |
| 5m 33s | |
| 9m 14s | |
| 12m 8s | |
| 9m 35s | |
| 13m 3s | |
| 11m 51s | |
| 7m 45s | |
| 9m 15s | |
| 11m 42s | |
| 11m 53s | |
| 12m 49s | |
| 8m 6s | |
| 9m 26s | |
| 9m 11s | |
| 8m 17s | |
| 12m 7s | |
| 8m 3s | |
| 10s | |
| 4h 1m 6s |