webservice call over https, timevalue influences performance

I am calling a webservice with a test program (below a stripped version). I have
generated a webserviceclient.jar with the clientgen task. 
I have to use a https connection. Which works but seems to be very slow.
When I use the http link, I get answers very quickly (within 100ms).
When I use the https link, i didn't get an answer, untill I added the property
for timeout and UseWebLogicURLStreamHandler.
The strange thing is that when I put the timeout on 30 seconds, I get answers
after 30seconds+approx. 100ms.
When I change the timeoutvalue to 5 seconds, the answers appear after
5seconds_approx.100ms. This is not what I expected. (I do actually get some
timeouts when I set the timeout value to 1 sec...)

I don't understand what's happening, can anybody help?
I'm using jars from weblogic8.1sp6.
Eventually this has to be called from a stateless session bean.


package webservice.test;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.xml.rpc.Stub;

import org.test.webserviceclient.IDataSoap;
import org.test.IData_Impl;

import weblogic.webservice.client.WLSSLAdapter;

public class Test {

	  public static void main(String[] args) throws Exception {

		  // Setup the global JAXM message factory
		  System.setProperty("javax.xml.soap.MessageFactory",
				  "weblogic.webservice.core.soap.MessageFactoryImpl");

		  // Setup the global JAX-RPC service factory
		  System.setProperty( "javax.xml.rpc.ServiceFactory",
				  "weblogic.webservice.core.rpc.ServiceFactoryImpl");

		  // Setup for timeout of webservice call
		 
System.setProperty("weblogic.webservice.UseWebLogicURLStreamHandler",
					"true");
		  // Parse the argument list
		  Test client = new Test();

		  //Client:
		  WLSSLAdapter.setStrictCheckingDefault(false);
		  //Weblogic Server:

		  //using this one I get an answer within 100ms
		  client.example("http://just-a-link.com/DataReq.asmx?WSDL");

		  //using this one I get an answer withing timeoutsecs+100ms (in this case
2.1secs)
		  client.example("https://just-a-link.com/DataReq.asmx?WSDL");
	  }

	  public void example(String wsdlURI) throws Exception {
		  IDataSoap port;
		  if (wsdlURI == null) {
			  port = new IData_Impl().getIDataSoap();
		  }
		  else {
			  port = new IData_Impl(wsdlURI).getIDataSoap();
		  }
		  Stub stub = (Stub) port;
		  stub._setProperty("weblogic.webservice.rpc.timeoutsecs",
"2");

		  String arg1="<mymessage>" +
		  		"</mymessage>";

		  String s1 = port.DataRequest(arg1);
		  System.out.println(s1);
	  }