The yk project, which automatically adds JIT compilers to C interpreters, has been successfully adapted to work with CPython, resulting in meaningful performance gains. After previously applying yk to smaller interpreters like PUC Lua, the team tackled CPython, which is significantly larger, and achieved notable improvements in just 3-4 days of work. The adapted version, ykcpython, not only outperforms standard CPython but also Python's experimental JIT, demonstrating the potential of yk to enhance performance in larger interpreters. This breakthrough addresses concerns about yk's scalability and paves the way for further optimization and development.