Jython, GILs and object locking.

[Daniel Dittmar]

Harri Pesonen wrote:
> It will be faster because there is no need to Py_INCREF(Py_None) or 
> Py_DECREF(Py_None) or other static variables, and because there is no 
> GIL or thread state swapping, but it will be slower because there will 
> be an extra state argument in function calls. I guess the speed will be 
> about the same for single-threaded programs. The real advantage comes of 
> course from free-threading.

Py_INCREF and Py_DECREF will have to use some kind of interlock to 
synchronize reference counting, this will probably slow down things a lot.

Daniel