feat: add Series|Expr.cum_count method
#2652
| Job | Run time |
|---|---|
| 1m 58s | |
| 2m 0s | |
| 1m 59s | |
| 3m 46s | |
| 52s | |
| 10m 35s |
Series|Expr.cum_count method
#2652
| Job | Run time |
|---|---|
| 1m 58s | |
| 2m 0s | |
| 1m 59s | |
| 3m 46s | |
| 52s | |
| 10m 35s |