> Please note that even on fast computers this program struggles to simulate the C64 hardware at real speed. A real C64 is simulated at 31% of its speed on an Apple M3 Max, 39% on an AMD Ryzen AI Max+ PRO 495 (Gorgon Halo), and 48% on an Apple M5 Max. This is not a problem for the goals of this program, but be warned: it is not an emulator to play games with.

Sounds like an optimization opportunity. Might take a look.