You can measure it yourself, this is not a philosophical thing you have to be skeptical about. It's not that 5% of the time was spent in icache misses, it’s mo

You can measure it yourself, this is not a philosophical thing you have to be skeptical about. It's not that 5% of the time was spent in icache misses, it’s more about cascading benefits of hitting the cache or predicting a branch correctly. You get more instruction level parallelism, less stalls, and in general more straightline execution without hitting memory.