CPython developers determined the leak is in PyEval_EvalFrameEx, which is used by Cython rather than Python, but is only present in Python 3.10 and earlier, but not Python 3.11 and later.

The CPython interpreter in Python 3.14 can use a feature in C code that uses tail calls between functions. When compiled with a C compiler that supports these features, CPython runs slightly faster.

Core developer Łukasz Langa, who also acts as the release manager for Python 3.8 and 3.9, will be charged with the day-to-day stewardship of CPython, overseeing contributions to the programming ...

With the introduction of this Faster CPython, Python 3.11 has been speeded up by 10% to 60% from Python 3.10, and it is said that an average speedup of 1.25 times has been achieved.