Kryonet RMI performance - rmi

Question

I was trying to run a performance test for Kryonet RMI, the test results are not convincing. However I think I may not be doing things in the right way. Can I get some feedback on the code below.
SERVER
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryonet.Connection;
import com.esotericsoftware.kryonet.Listener;
import com.esotericsoftware.kryonet.Server;
import com.esotericsoftware.kryonet.rmi.ObjectSpace;
public class Razor {
static int port = 2551;
static String send = null;
// Data Creator, creates data of size s.getBytes().length * 10
static String createMsg(String s){
StringBuilder sb = new StringBuilder();
for (int i = 0 ; i < 10; i++){
sb.append(s);
}
System.out.println(sb.toString().getBytes().length);
return sb.toString();
}
// Test Interface
public static interface TestInterface {
public String getName (String name);
}
//Class implementing the test interface.
static private class TestImpl implements TestInterface {
public String getName (String name) {
return send;
}
}
public static void main (String[] args) throws Exception {
// Creating data of size 160 bytes
send = createMsg("FooAndBarAndLazy");
Server server = new Server();
Kryo kryo = server.getKryo();
ObjectSpace.registerClasses(kryo);
kryo.register(TestInterface.class);
server.start();
server.bind(port);
System.out.println("Server started on " + port);
TestImpl test = new TestImpl();
final ObjectSpace objectSpace = new ObjectSpace();
objectSpace.register(123, test);
server.addListener(new Listener() {
public void connected (final Connection connection) {
objectSpace.addConnection(connection);
}
});
}
}
CLIENT
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryonet.Client;
import com.esotericsoftware.kryonet.rmi.ObjectSpace;
public class TBone {
static int port = 2551;
// Bytes to MB converter
public static float b2mb(long bytes){
float bb = bytes;
float ll = 1024 * 1024;
return bb/ll;
}
// Nono Seconds to seconds converter
public static float ns2s(long nsecs){
float f = nsecs;
float t = 1000000000;
return f/t;
}
public static void main (String[] args) throws Exception {
Client client = new Client();
Kryo kryo = client.getKryo();
ObjectSpace.registerClasses(kryo);
kryo.register(Razor.TestInterface.class);
client.start();
client.connect(50000, "localhost", port);
Razor.TestInterface test = ObjectSpace.getRemoteObject(client, 123, Razor.TestInterface.class);
String profile = null;
int bytes = 0;
long stime = System.nanoTime();
for (int i = 0; i < 1000; i++){
profile = test.getName("");
bytes = bytes + profile.getBytes().length;
if (i %100 == 0) System.out.println("Done : " + i);
}
long etime = System.nanoTime();
System.out.println("Total bytes(MB) : " + b2mb(bytes)+" , " + "Total time : " + ns2s((etime-stime))+" seconds");
client.stop();
}
}
RESULT
Done : 0
Done : 100
Done : 200
Done : 300
Done : 400
Done : 500
Done : 600
Done : 700
Done : 800
Done : 900
Total bytes(MB) : 0.15258789 , Total time : 26.139627 seconds
I would imagine way more performance. Is this a valid test?

Answer 1

This isn't a valid test of performance because even in a localhost request you have a strong latency and your test program wait for the server response before sending next request (as a rmi method call is by nature blocking).
Since you do it 900 time, even without any java processing you have to wait :
number_of_request * travel_time(latency) * 2(one travel for the request and one for the response).
So in your case :
900 * 0.03seconds (ping localhost to see your local latency) ~= 27 seconds