TCP roundtrip times over loopback in the presence of 1&#x2F;10&#x2F;100&#x2F;1000&#x2F;1000 parallel connections:<p>Old version (poll):<p>10&#x2F;12&#x2F;22&#x2F;435&#x2F;10500 us.<p>New version(epoll):<p>10&#x2F;13&#x2F;8&#x2F;6&#x2F;6 us.