feat: generalize autogram.Engine (non-batched support)
#1685
| Job | Run time |
|---|---|
| 45s | |
| 1m 52s | |
| 1m 6s | |
| 1m 20s | |
| 1m 56s | |
| 1m 52s | |
| 2m 5s | |
| 2m 49s | |
| 2m 29s | |
| 2m 1s | |
| 2m 30s | |
| 2m 15s | |
| 1m 36s | |
| 2m 3s | |
| 2m 41s | |
| 29m 20s |