The only reason to consider type hints is for a performance increase and there wasn't any mention of that. What can you really expect from using type hints accurately?
> The only reason to consider type hints is for a performance increase
No, the reason to consider type hints is because it makes it easier to understand existing code and write new code that interacts with it correctly. Comprehensibility and correctness are more important than performace.
In a dynamically typed language, that's what comments are for. Since you didn't need types specified in the first place, why would you have trouble interacting with it? Comprehensibility and correctness are just as important as performance.
Type hints are great when using FastAPI. Your inputs are automatically validated, and you get a /docs endpoint that tells people what to expect from your API.
I'd say performance is far from the only reason to consider type hints.
Similarly for Typer, which is literally "the FastAPI of CLIs"[1]. Handy to type your `main` parameters and have CLI argument parsing. For more complicated cases, it's a wrapper around Click.
> Mypyc compiles Python modules to C extensions. It uses standard Python type hints to generate fast code. Mypyc uses mypy to perform type checking and type inference.
> Mypyc can compile anything from one module to an entire codebase. The mypy project has been using mypyc to compile mypy since 2019, giving it a 4x performance boost over regular Python.
I have not experience a 4x boost, rather between 1.5x and 2x. I guess it depends on the code.
