perf: preallocate Cache during preparation for ForwardDiff
#1861
| Job | Run time |
|---|---|
| 4m 43s | |
| 11m 13s | |
| 12m 56s | |
| 25m 15s | |
| 7m 8s | |
| 16m 59s | |
| 18m 56s | |
| 3m 6s | |
| 4m 53s | |
| 31m 55s | |
| 16m 43s | |
| 2m 40s | |
| 11m 21s | |
| 6m 22s | |
| 23m 12s | |
| 12m 39s | |
| 7m 5s | |
| 22m 54s | |
| 9m 39s | |
| 14m 21s | |
| 10m 15s | |
| 19m 18s | |
| 19m 0s | |
| 4m 50s | |
| 9m 41s | |
| 8m 51s | |
| 13m 10s | |
| 1m 3s | |
| 9m 10s | |
| 1m 4s | |
| 5m 1s | |
| 47s | |
| 12m 52s | |
| 11m 56s | |
| 10m 53s | |
| 10m 28s | |
| 10m 14s | |
| 8m 24s | |
| 6m 8s | |
| 5m 1s | |
| 4m 13s | |
| 4m 10s | |
| 4m 9s | |
| 1s | |
| 1s | |
| 7h 34m 40s |