Implement "sequential" strategy for BalancingLearner
#561
| Job | Run time |
|---|---|
| 3m 58s | |
| 3m 56s | |
| 3m 50s | |
| 5m 3s | |
| 2m 46s | |
| 2m 28s | |
| 2m 25s | |
| 2m 27s | |
| 4m 49s | |
| 5m 28s | |
| 5m 13s | |
| 6m 10s | |
| 48m 33s |