You already grok these latency numbers, right?
From Jonas Boner , Jeff Dean , and Peter Norvig , we have this awesome gist showing latency numbers for different types of data access The numbers pretty much speak for themselves, and its always good to hammer home exactly how bad a disk access is. That said, an L1 cache-miss is a 14x hit! Wild... Heres the same data visualized (from ayshen )... (click to embiggen)