PL/pgSQL and shared_preload_libraries

Bruce Momjian <bruce@momjian.us> writes:

Since we now install PL/pgSQL by default, should we configure
shared_preload_libraries to preload PL/pgSQL?

I don't think that follows. The fact that it's there doesn't mean
everyone is using it. In any case, I've seen no evidence that says
you'd get a performance win this way. The preload feature is meant
for modules that do a substantial amount of work at load time, which
plpgsql does not.

regards, tom lane