Let count, sum, and prod take an init kwarg
#1061
| Job | Run time |
|---|---|
| 1m 15s | |
| 2m 23s | |
| 2m 41s | |
| 2m 24s | |
| 2m 40s | |
| 2m 41s | |
| 2m 30s | |
| 2m 39s | |
| 2m 39s | |
| 2m 25s | |
| 2m 39s | |
| 2m 37s | |
| 1s | |
| 2m 23s | |
| 2m 25s | |
| 1m 10s | |
| 2m 40s | |
| 2m 38s | |
| 1s | |
| 2m 24s | |
| 2m 29s | |
| 1s | |
| 45m 45s |