CPython Internals Explained

by yufiz on 1/27/2026, 2:07:37 PM

https://github.com/zpoint/CPython-Internals

Comments

by: damjon

I've been comparing various platforms and discussing them with ChatGPT—for instance, why Python's execution is slower than JavaScript's V8. It claimed this is due to mtechnical debt and the inability to change because libraries like NumPy bypass public interfaces and access data directly.<p>I'm wondering how much of that is true and what is just a hallucination."<p>Btw: JavaScript seems to have similar complexity issues.<p>Edit: Python has no JIT

1/31/2026, 5:02:21 PM

by: tonymet

I wish they would just go back to calling it Python, since it’s the Python that everyone knows and uses. No one gets confused over Python the spec and Python the implementation. Every time I see “CPython” i have to double check we’re just talking about Python.<p>I guess they “CPython’ed” back when people thought Jython would take off , and it never did because Java sucks.

1/31/2026, 5:08:29 PM

by: mvATM99

Very interesting! Gonna look through this for sure in the next weeks

1/31/2026, 4:44:38 PM

by: davidkwast

Nice

1/31/2026, 4:45:08 PM