Optimise how? There already is only the local case in Wayland, pixel data is shared using shared memory which only works locally. Only small communication messages are sent via the socket. And the Wayland protocol also uses native endianness because, again, it only cares about the local case. It even sends file descriptors over the socket.

So what would you do differently in an alternative client library?

> So what would you do differently in an alternative client library?

I should have better disclaimed my comment.... to be clear I don't know much about the graphics subject, I probably should have prefaced it with,

"I don't know anything about Wayland but as someone totally naieve on the subject but assuming someone else's assumption".

At least to me, even if it breaks the X11 model (Which is a shame, that was fun to play with back in the day) if they're doing it the way they are I'm guessing Chesterton's fence will come into play at one point or another.