code: @Override
  	public long hash64() {
  		final byte[] urlBuffer = url.elements();
  		final int startOfHost = BURL.startOfHost(urlBuffer);
  		return MurmurHash3.hash(urlBuffer, startOfHost, BURL.lengthOfHost(urlBuffer, startOfHost));
  	 }
docs: A hash based on the host of {@link #url}.
  
  return a hash based on the host of {@link #url}.