How small is really, really small? Something that is small in a x86 sense is not at all small in an embedded world. If you could elaborate a bit on the performa

How small is really, really small? Something that is small in a x86 sense is not at all small in an embedded world. If you could elaborate a bit on the performance requirements for the application I'd be really happy. I am curious how it compares to an equivalent ARM (f. x. the 12kgate Cortex-M0+) in terms of area, power, performance.