http://www.qqread.com/netbase/w478517.html
JDK 6和CGLib cglib-nodep-2.2.jar对比结果：
JDK Proxy: 1,049,937 calls/s
CGLIB: 2,820,130 calls/s
如果使用cglib以前版本，性能更快：
JDK Proxy: 1,037,575 calls/s
CGLIB: 3,112,727 calls/s
而JDK 6和JavaAssit 3.11测试结果如下：
JDK Proxy: 1,037,575 calls/s
JAVAASSIST: 626,695 calls/s
从数据上看，cglib性能最好。但是和ASM、直接调用比较还不知道。
public class ProxyPerformanceComparison2 {
public static void main(String[] args) throws Exception {
Callable<integer> jdkProxy = (Callable<integer>)
Proxy.newProxyInstance(ClassLoader.getSystemClassLoader(), new Class[] {
Callable.class },
new JdkHandler(new Counter()));
ProxyFactory f = new ProxyFactory();
f.setInterfaces(new Class[] { Callable.class });
Class c = f.createClass();
Callable<integer> cglibProxy = (Callable<integer>) c.newInstance();
((ProxyObject) cglibProxy).setHandler
(new JavaAssitInterceptor(new Counter()));
for (int i2 = 0; i2 < 10; i2++) {
iterate(jdkProxy, "JDK Proxy: ");
iterate(cglibProxy, "JAVAASSIST: ");
System.err.println();
}
}
static final DecimalFormat format = new DecimalFormat();
static void iterate(Callable<integer> callable, String label)
throws Exception {
int count = 10000000;
long time = System.currentTimeMillis();
int total = 0;
for (int i = 0; i < count; i++) {
total += callable.call();
}
time = System.currentTimeMillis() - time;
System.err.println(label + format.format
(count * 1000 / time) + " calls/s");
}
static class JdkHandler implements InvocationHandler {
final Object delegate;
JdkHandler(Object delegate) {
this.delegate = delegate;
}
public Object invoke
(Object object, Method method, Object[] objects) throws Throwable {
return method.invoke(delegate, objects);
}
}
static class JavaAssitInterceptor implements MethodHandler {
final Object delegate;
JavaAssitInterceptor(Object delegate) {
this.delegate = delegate;
}
public Object invoke
(Object self, Method m, Method proceed, Object[] args) throws Throwable {
return m.invoke(delegate, args);
}
}
static class Counter implements Callable<integer> {
int count = 0;
public Integer call() throws Exception {
return count++;
}
}
}
public static void main(String[] args) throws Exception {
Callable<integer> jdkProxy = (Callable<integer>)
Proxy.newProxyInstance(ClassLoader.getSystemClassLoader(), new Class[] {
Callable.class },
new JdkHandler(new Counter()));
ProxyFactory f = new ProxyFactory();
f.setInterfaces(new Class[] { Callable.class });
Class c = f.createClass();
Callable<integer> cglibProxy = (Callable<integer>) c.newInstance();
((ProxyObject) cglibProxy).setHandler
(new JavaAssitInterceptor(new Counter()));
for (int i2 = 0; i2 < 10; i2++) {
iterate(jdkProxy, "JDK Proxy: ");
iterate(cglibProxy, "JAVAASSIST: ");
System.err.println();
}
}
static final DecimalFormat format = new DecimalFormat();
static void iterate(Callable<integer> callable, String label)
throws Exception {
int count = 10000000;
long time = System.currentTimeMillis();
int total = 0;
for (int i = 0; i < count; i++) {
total += callable.call();
}
time = System.currentTimeMillis() - time;
System.err.println(label + format.format
(count * 1000 / time) + " calls/s");
}
static class JdkHandler implements InvocationHandler {
final Object delegate;
JdkHandler(Object delegate) {
this.delegate = delegate;
}
public Object invoke
(Object object, Method method, Object[] objects) throws Throwable {
return method.invoke(delegate, objects);
}
}
static class JavaAssitInterceptor implements MethodHandler {
final Object delegate;
JavaAssitInterceptor(Object delegate) {
this.delegate = delegate;
}
public Object invoke
(Object self, Method m, Method proceed, Object[] args) throws Throwable {
return m.invoke(delegate, args);
}
}
static class Counter implements Callable<integer> {
int count = 0;
public Integer call() throws Exception {
return count++;
}
}
}