Is latency the same thing as duration? I think of latency as being more like a vector-with-starting-point (a “ray segment”?) than a scalar, it’s “rooted” to a

Is latency the same thing as duration? I think of latency as being more like a vector-with-starting-point (a “ray segment”?) than a scalar, it’s “rooted” to a point in time, so it doesn’t make sense to sum them.