add --nominal-hashrate-multiplier to mining-device
#599
| Job | Run time |
|---|---|
| 3m 31s | |
| 2m 3s | |
| 1m 6s | |
| 1m 8s | |
| 1m 3s | |
| 56s | |
| 1m 22s | |
| 3m 47s | |
| 3m 18s | |
| 2m 52s | |
| 3m 1s | |
| 3m 37s | |
| 3m 24s | |
| 3m 31s | |
| 3m 9s | |
| 4m 14s | |
| 2m 47s | |
| 2m 43s | |
| 1s | |
| 47m 33s |