If I may jump in: One of the more critical issues with real-time audio processing on CPUs (as opposed to DSPs) is latency. And Core Audio in both, MacOS and iOS, is particularly good in this regard compared to the equivalent structures in Windows and Android (and probably also Linux).
It's an older paper, but the general direction still holds up today:
It's an older paper, but the general direction still holds up today:
https://www.researchgate.net/publication/267780532_Audio_lat...