In the Q&A session following my EuroPython 2025 presentation about the Microdot web framework, a member of the audience asked me what the performance of MicroPython running on a microcontroller is. This took me a bit by surprise, because while I knew that microcontrollers are slow and underpowered devices, I really had no way to quantify this. I never questioned the supposedly low performance, because it was never a problem for me. My answer to the question was that microcontrollers cannot repla...