4 ms·

> But the actual code for YieldProcessor is a NOP on x86:[2] > asm volatile( "rep; nop" : : : "memory" ); It might look like a NOP, but "REP NOP" is n

by cesarb 2y ago

> But the actual code for YieldProcessor is a NOP on x86:[2] > __asm__ __volatile__( "rep; nop" : : : "memory" ); It might look like a NOP, but "REP NOP" is not a real NOP, it's the PAUSE instruction (which very old processors from the 1990s treated as a normal NOP).