Add argparse benchmarks for subparsers and many optionals
#1697
| Job | Run time |
|---|---|
| 6m 7s | |
| 5m 49s | |
| 7m 19s | |
| 7m 55s | |
| 8m 2s | |
| 8m 56s | |
| 7m 31s | |
| 8m 39s | |
| 10m 13s | |
| 9m 41s | |
| 5m 12s | |
| 13m 38s | |
| 1h 39m 2s |