It is less true for formats that deserialize faster. I still don't see where she is confusing the two. At the very top, she explicitly notes them separately: "

It is less true for formats that deserialize faster. I still don't see where she is confusing the two. At the very top, she explicitly notes them separately: "I will not use web requests when the situation calls for RPCs. I will not use 'green' (userspace) 'threads' when there are actual OS-level threads and parallelization is necessary."