perf: preallocate Cache during preparation for ForwardDiff
#1863
| Job | Run time |
|---|---|
| 3m 1s | |
| 9m 22s | |
| 10m 55s | |
| 18m 54s | |
| 3m 20s | |
| 12m 11s | |
| 15m 6s | |
| 33m 31s | |
| 1m 58s | |
| 3m 23s | |
| 17m 47s | |
| 1m 31s | |
| 10m 42s | |
| 5m 8s | |
| 27m 44s | |
| 11m 47s | |
| 5m 35s | |
| 22m 37s | |
| 7m 48s | |
| 12m 51s | |
| 9m 15s | |
| 17m 37s | |
| 21m 34s | |
| 3m 46s | |
| 7m 53s | |
| 3m 34s | |
| 7m 49s | |
| 3m 57s | |
| 5m 21s | |
| 27m 1s | |
| 2m 7s | |
| 16m 29s | |
| 38m 20s | |
| 20m 9s | |
| 7m 39s | |
| 34m 31s | |
| 14m 44s | |
| 21m 29s | |
| 15m 51s | |
| 27m 41s | |
| 32m 42s | |
| 5m 19s | |
| 14m 42s | |
| 12m 45s | |
| 18m 32s | |
| 10h 25m 58s |