Add argparse benchmarks for subparsers and many optionals (#367)
#1714
| Job | Run time |
|---|---|
| 6m 2s | |
| 6m 10s | |
| 7m 29s | |
| 7m 44s | |
| 8m 7s | |
| 9m 28s | |
| 7m 46s | |
| 9m 42s | |
| 10m 46s | |
| 9m 51s | |
| 7m 35s | |
| 13m 33s | |
| 1h 44m 13s |