jboss-4.2.3.GA分别部署EJB1和EJB3，为何在客户端调用速度相差这么多？

[stjauns]

分别用EJB1（J2EE1.3）和EJB3（Java EE 5）实现了下面的功能：
服务器端就一个自定方法：

public String doThings(String para) throws EJBException {
System.out.println(para);
return "did : " + para;
}

在客户端调用EJB1的代码：
long ll = System.currentTimeMillis();
Hashtable<String, String> properties = new Hashtable<String, String>();
properties.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
properties.put(Context.PROVIDER_URL, "jnp://218.16.125.93");
AllTestHome home = null;
AllTest test = null;
InitialContext ctx = new InitialContext(properties);
System.out.println("ctx init ok!" + (System.currentTimeMillis() - ll));
ll = System.currentTimeMillis();
Object obj = ctx.lookup(AllTestHome.JNDI_NAME);
home = (AllTestHome) PortableRemoteObject
.narrow(obj, AllTestHome.class);
test = home.create();
System.out.println("remote lookup ok!"
+ (System.currentTimeMillis() - ll));
ll = System.currentTimeMillis();
System.out.println(test.doThings("select now();"));
System.out.println("function execute ok!"
+ (System.currentTimeMillis() - ll));

在客户端调用EJB3代码：
long ll = System.currentTimeMillis();
Hashtable<String, String> properties = new Hashtable<String, String>();
properties.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
properties.put(Context.PROVIDER_URL, "jnp://218.16.125.93");
InitialContext ctx = new InitialContext(properties);
System.out.println("ctx init ok!" + (System.currentTimeMillis() - ll));
ll = System.currentTimeMillis();
SessionallRemote remote = (SessionallRemote) ctx
.lookup("Sessionall/remote");
System.out.println("remote lookup ok!"
+ (System.currentTimeMillis() - ll));
ll = System.currentTimeMillis();
System.out.println(remote.doThings("select now();"));
System.out.println("function execute ok!"
+ (System.currentTimeMillis() - ll));

在客户端分别执行两端代码三次，都成功了，但是输入如下：
EJB1：
ctx init ok!31
remote lookup ok!687
did : select now();
function execute ok!32

ctx init ok!31
remote lookup ok!719
did : select now();
function execute ok!47

ctx init ok!32
remote lookup ok!703
did : select now();
function execute ok!47

EJB3：
ctx init ok!47
remote lookup ok!422
Doing:select now();
function execute ok!360

ctx init ok!46
remote lookup ok!469
Doing:select now();
function execute ok!406

ctx init ok!47
remote lookup ok!453
Doing:select now();
function execute ok!422

我的疑问在于：
function execute ok!代表的执行自定义方法的时间，为什么EJB3的时间比EJB1的时间要多上一个数量级？
而且是每次执行方法都要多上一个数量级的时间。

[lisl2003]

不懂，标记，学习一下