zcash_client_backend: Allow sharing instances of ScanningKeys between threads
#5303
| Job | Run time |
|---|---|
| 1m 50s | |
| 1m 35s | |
| 1m 51s | |
| 2m 34s | |
| 4m 15s | |
| 2m 45s | |
| 2m 12s | |
| 1m 56s | |
| 7m 28s | |
| 12s | |
| 17m 19s | |
| 17s | |
| 2m 28s | |
| 1m 45s | |
| 12s | |
| 9m 31s | |
| 10m 53s | |
| 9m 21s | |
| 17m 53s | |
| 13m 19s | |
| 13m 49s | |
| 17m 31s | |
| 15m 12s | |
| 2h 36m 8s |