Java InetAddress.getHostName() taking a very long time to execute

Question

I have the following little code snippet:

        InetAddress address = InetAddress.getByName(host);
        if(address.isReachable(TIMEOUT_IN_MILLISECONDS))         


        

Answer 1

Some of the addresses need longer time to be resolved. InetAddress has a cache to store successful and unsuccessful resolutions. Also, make a threadpool. You can improve the performance