进程内，进程间和内部机器调用之间的相对差异是什么？

Ignoring payload size, what is relative difference in latency between an in-proc call (say in C++ or Java), a socket call to a process on the same machine, and a socket call to a process on another machine? This can be expressed as a minimum latency in ns/ms or in terms of relative orders of magnitude. Ignoring payload size, what is relative differe