henk de wit <henk53602(at)hotmail(dot)com> writes:
> I still have some work to do to find out why dumping in the custom
> format is so much slower.
Offhand the only reason I can see for it to be much different from
plain-text output is that -Fc compresses by default. If you don't
care about that, try -Fc -Z0.
regards, tom lane