Java 反射与cglib.proxy与cglib.beanmap与直接赋值 性能对比

测试代码：
代码import java.lang.reflect.Method;
import java.util.Calendar;
import java.util.Date;

import net.sf.cglib.beans.BeanMap;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class TestPerformance
{
public static void main(String[] args)
{
int times = 10000000;
// TestBean(times);//=15
// TestCglib(times);//=516
// TestBeanMap(times);//=256
TestReflection(times);// =11359
}

public static void TestBean(int times)
{
MyBean bean = new MyBean();

Date start = Calendar.getInstance().getTime();
for (int i = 0; i < times; i++)
{
bean.setName("helloworld");
Object v = bean.getName();
}

Date end = Calendar.getInstance().getTime();

System.out.println(end.getTime() - start.getTime());
}

public static void TestCglib(int times)
{
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(MyBean.class);
enhancer.setCallback(new TestMethodInterceptorImpl());
MyBean my = (MyBean) enhancer.create();

Date start = Calendar.getInstance().getTime();
for (int i = 0; i < times; i++)
{
my.setName("helloworld");
Object v = my.getName();
}

Date end = Calendar.getInstance().getTime();

System.out.println(end.getTime() - start.getTime());
}

public static void TestBeanMap(int times)
{
MyBean bean = new MyBean();
BeanMap map = BeanMap.create(bean);

Date start = Calendar.getInstance().getTime();
for (int i = 0; i < times; i++)
{
map.put(bean, "name", "helloworld");
Object v = bean.getName();
}
Date end = Calendar.getInstance().getTime();

System.out.println(end.getTime() - start.getTime());
}

public static void TestReflection(int times)
{
MyBean bean = new MyBean();
Class c = MyBean.class;
try
{
Method get = c.getDeclaredMethod("getName", null);
Method set = c.getDeclaredMethod("setName", String.class);
Date start = Calendar.getInstance().getTime();
for (int i = 0; i < times; i++)
{
set.invoke(bean, "helloworld");
Object v = get.invoke(bean, null);
}
Date end = Calendar.getInstance().getTime();

System.out.println(end.getTime() - start.getTime());
} catch (Exception ex)
{

}
}
}

class TestMethodInterceptorImpl implements MethodInterceptor
{
public Object intercept(Object obj, Method method, Object[] args,
MethodProxy proxy) throws Throwable
{
return proxy.invokeSuper(obj, args);
}
}

class MyBean
{
private String name;

public String getName()
{
return name;
}

public void setName(String name)
{
this.name = name;
}
}

测试结果：

直接赋值 = 15

cglib.proxy = 516

cglib.beanmap = 256

reflection = 11359