perf: don't concat the batches when merging partitions #8620
| Job | Run time |
|---|---|
| 15m 9s | |
| 31s | |
| 3m 41s | |
| 11s | |
| 24m 9s | |
| 33m 50s | |
| 14m 5s | |
| 18m 6s | |
| 24m 15s | |
| 2m 11s | |
| 23m 19s | |
| 2h 39m 27s |
| Job | Run time |
|---|---|
| 15m 9s | |
| 31s | |
| 3m 41s | |
| 11s | |
| 24m 9s | |
| 33m 50s | |
| 14m 5s | |
| 18m 6s | |
| 24m 15s | |
| 2m 11s | |
| 23m 19s | |
| 2h 39m 27s |