argon2-cffi/docs/cli.md

CLI

To aid you with finding the parameters, argon2-cffi offers a CLI interface that can be accessed using python -m argon2. It will benchmark Argon2's password verification in the current environment:

$ python -m argon2
Running Argon2id 100 times with:
hash_len: 32 bytes
memory_cost: 65536 KiB
parallelism: 4 threads
time_cost: 3 iterations

Measuring...

45.7ms per password verification

You can use command line arguments to set hashing parameters. Either by setting them one by one (-t for time, -m for memory, -p for parallelism, -l for hash length), or by passing --profile followed by one of the names from {mod}argon2.profiles. In that case, the other parameters are ignored. If you don't pass any arguments as above, it runs with {class}argon2.PasswordHasher's default values.

This should make it much easier to determine the right parameters for your use case and your environment.