statistics: fix the memory leak of region statistics (#8711) #22203
| Job | Run time |
|---|---|
| 3m 29s | |
| 5m 5s | |
| 4m 11s | |
| 3m 28s | |
| 5m 34s | |
| 6m 0s | |
| 3m 18s | |
| 3m 21s | |
| 3m 38s | |
| 6m 43s | |
| 33s | |
| 45m 20s |
| Job | Run time |
|---|---|
| 3m 29s | |
| 5m 5s | |
| 4m 11s | |
| 3m 28s | |
| 5m 34s | |
| 6m 0s | |
| 3m 18s | |
| 3m 21s | |
| 3m 38s | |
| 6m 43s | |
| 33s | |
| 45m 20s |