Depends on how you define performance; a decent chunk of IoT devices have good performance on a per-joule basis (rather than per-second), although that's nowher

Depends on how you define performance; a decent chunk of IoT devices have good performance on a per-joule basis (rather than per-second), although that's nowhere near guarranteed. And the lack of hardware sharing is more for lack of demand than lack of ability. The S in IoT stands for security.