Add argparse benchmarks for subparsers and many optionals
#1696
| Job | Run time |
|---|---|
| 1m 41s | |
| 1m 45s | |
| 1m 57s | |
| 1m 41s | |
| 1m 58s | |
| 2m 15s | |
| 2m 3s | |
| 2m 6s | |
| 1m 26s | |
| 1m 19s | |
| 1m 24s | |
| 2m 10s | |
| 21m 45s |