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She does mention:

> each request was taking 6 / 60 = 0.1s = 100ms of time using-or-waiting-for-the-CPU.

(emphasis mine)

In my original read, I thought her core count was greater than her load, so that would also be her direct time-on-cpu. Now I'm not so sure.

And while time-waiting-for-cpu might not be important to optimizing the codebase, you probably still want to know that your serving processes are waiting for CPU; after all, it is that number that your user's browser is seeing (at least, between the two it is moreso that one). Such a result might indicate a larger machine or more machines are required, for example.




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