The per-subinterpreter GIL that shipped in 3.12 should also help with situations where native code frameworks want to have parallel callbacks to Python code. Bu

The per-subinterpreter GIL that shipped in 3.12 should also help with situations where native code frameworks want to have parallel callbacks to Python code. But your logging use case is a good example of the problems because the Python code would still have to solve synchronisation there even without a GIL.