Fix Python UDAF list-of-timestamps return by enforcing list-valued scalars and caching PyArrow types #2486
| Job | Run time |
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| 14s | |
| 24m 37s | |
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| 39m 36s | |
| 41m 55s | |
| 1h 3m 0s | |
| 57m 14s | |
| 36s | |
| 12s | |
| 4h 12m 51s |
| Job | Run time |
|---|---|
| 48s | |
| 14s | |
| 24m 37s | |
| 24m 39s | |
| 39m 36s | |
| 41m 55s | |
| 1h 3m 0s | |
| 57m 14s | |
| 36s | |
| 12s | |
| 4h 12m 51s |