It's explained under the first link from the article [0]: "A new type of interpreter has been added to CPython. It uses tail calls between small C functions th

It's explained under the first link from the article [0]: "A new type of interpreter has been added to CPython. It uses tail calls between small C functions that implement individual Python opcodes, rather than one large C case statement." [0] https://docs.python.org/3.14/whatsnew/3.14.html#whatsnew314-tail-call https://docs.python.org/3.14/whatsnew/3.14.html#whatsnew314-...