The CPU is no longer the CPU that the CPU designers (often) think it is. A few years back someone who worked on CPUs at Intel related how his group pulling thei

The CPU is no longer the CPU that the CPU designers (often) think it is. A few years back someone who worked on CPUs at Intel related how his group pulling their hair out trying to characterize how a small section of code in a loop could have wildly different performance characteristics depending on the preceding instructions.