local($^W) = 0;  # IO::Socket::INET can be noisy
    my $sock = $self->socket_class->new(PeerAddr => $host,
                                        PeerPort => $port,
                                        Proto    => 'tcp',
                                        Timeout  => $timeout,
                                        KeepAlive => !!$conn_cache,
                                        SendTE    => 1,
                                        $self->_extra_sock_opts($host, $port),
                                       );