For what reason did Python abandon the use of processor ticks in the implementation of the interpreter?

Python abandoned the use of CPU ticks in the interpreter implementation due to performance issues and management complexity.

Previously, the tick counting mechanism was used to implement thread switching (GIL - Global Interpreter Lock) and task scheduling. However, tick counting led to frequent interruptions and reduced code execution efficiency.

Instead, modern versions of Python (starting from 3.2) use a bytecode instruction counting mechanism, which more accurately and efficiently controls thread switching and scheduling.

This improves performance and reduces overhead in managing multithreading within the interpreter.