Note that, for Linux, "IPC" is kind of loaded since it tends to refer to TCP/Unix sockets/signals/etc., which aren't used as much as IPC on a microkernel system. The right comparison would probably be with system calls overhead.

That table shows 0.09us (or 90ns) for a 1-way IPC; a cheap system call on my laptop (using https://raw.githubusercontent.com/tsuna/contextswitch/master... because I'm lazy) is about 59ns, 2-way.