Nope, all depends on type of load. HT is an opimization to context switching but if your code running on both utilizes different parts of core (say one loads s

Nope, all depends on type of load. HT is an opimization to context switching but if your code running on both utilizes different parts of core (say one loads some memory while others does some math), you can get speedup that's above savings from not having to context switch. But early on it wasn't really that well optimized so you might've had OS put 2 threads on 2/1 HT/core while other core sits idle