When I print routes defined on my computer using
route, it takes about 5 to 20 seconds to complete. Why does it take so much time?
With VPN enabled:
$ time sudo route Kernel IP routing table (...) real 0m21.423s user 0m0.000s sys 0m0.012s
With no VPN, this is about 5 seconds - still, computer can do a lot in this time. I've repeated my measurements few times, getting very similar results each try.
My machine is Ubuntu with 3.0.0 kernel, but as far as I know, route on the other computers works the same way.