[cirospaciari]

PyPy work well with CPython modules but the performance is not that great, with CFFI performance is really good in PyPY, HPy project will change this https://hpyproject.org/

[throwaway894345]

Last I checked, Pypy wasn’t compatible with many important packages in the Python ecosystem. As of a couple years ago, there was no trustworthy, supported package for talking to a Postgres database with Pypy because psycopg2 wasn’t supported.

[svth]

I've been using PyPy and psycopg2cffi in production for the last 5-6 years or so without any issues.

https://pypi.org/project/psycopg2cffi/

[throwaway894345]

Interesting. I wasn't able to get that working when I tried several years ago. I forget the specific issue.

[qorrect]

When is the last time you checked ?

I have run it with pandas+numpy and postgres+timescale without issue for the last year.

[throwaway894345]

Several years ago now.

[cirospaciari]

postgresql can work with psycopg2 but is not the same performance as psycopg2cffi , i will integrate some databases to PyPy, and also HPy project will bring any Cython library to PyPy with basically the same performance or better.