There are a few things in this diagram that always drive me a little crazy. Why is it that 1,000ns ≈ 1μs while 1,000,000ns = 1ms (almost equals vs. regular equals). It kinda makes sense to use almost equals for some of the real values, but they do it for pure values that are just there for conversions... but not with all of them, only with some.
All this being said, this is actually a very useful and well done diagram. But, imo, it would be even better if it used equal signs in a consistent way.
My guess is it's a typo in: 10,000ns ~ 10us = [green cube] and it's supposed to read 10,000ns = 10us = [green cube]
and this is a key as are black red and blue, all of the speed measures are approximate.
All this being said, this is actually a very useful and well done diagram. But, imo, it would be even better if it used equal signs in a consistent way.