Add argparse benchmarks for subparsers and many optionals
#1695
| Job | Run time |
|---|---|
| 1m 42s | |
| 1m 42s | |
| 1m 44s | |
| 1m 46s | |
| 1m 49s | |
| 1m 58s | |
| 1m 52s | |
| 2m 9s | |
| 1m 30s | |
| 1m 23s | |
| 1m 50s | |
| 2m 5s | |
| 21m 30s |