So would this rely on a known compiled binary they could reliably project/simulate/anticipate? This seems vaguely like when they would use page fault boundarie

So would this rely on a known compiled binary they could reliably project/simulate/anticipate? This seems vaguely like when they would use page fault boundaries to extract passwords. An OS/hardware event that occurs within some if-then to leak parts of the "key". Do we need some sort of "random delays" or binary execution randomization?