对象创建性能问题（new，clone，Serializable）

package com.dashu.application;
import com.dashu.bean.Cat;
import com.dashu.bean.HeavyBean;
import com.dashu.utils.CloneUtil;
import org.junit.jupiter.api.Test;
/**
 * @Auther: DaShu
 * @Date: 2021/7/22 17:21
 * @Description:
 */
public class SampleTwo {
    /**
     * 序列化是永远是最慢的，超大时 clone > new ,超小时，new > clone
     * */
    @Test
    public void testOne() throws Exception {
        //超大型对象，效率：clone > 序列化 > new
        HeavyBean heavyBean1 = null;
        CloneUtil<HeavyBean> heavyBeanCloneUtil = new CloneUtil<HeavyBean>();
        long oneTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            heavyBean1 = new HeavyBean();
        }
        long twoTime = System.nanoTime();
        System.out.println((twoTime - oneTime) / 10 + "nm");//49121890nm
        long threeTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            HeavyBean heavyBean2 = (HeavyBean) heavyBean1.clone();
        }
        long fourTime = System.nanoTime();
        System.out.println((fourTime - threeTime) / 10 + "nm");//1080nm
        long fiveTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            HeavyBean heavyBean3 = heavyBeanCloneUtil.Clone(heavyBean1);
        }
        long sixTime = System.nanoTime();
        System.out.println((sixTime - fiveTime) / 10 + "nm");//1763650nm
    }
    @Test
    public void testTwo() throws Exception {
        //超小型对象，效率：clone > new > 序列化
        Cat cat = null;
        CloneUtil<Cat> heavyBeanCloneUtil = new CloneUtil<Cat>();
        long oneTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            cat = new Cat();
        }
        long twoTime = System.nanoTime();
        System.out.println((twoTime - oneTime) / 10 + "nm");
        long threeTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            Cat cat2= (Cat) cat.clone();
        }
        long fourTime = System.nanoTime();
        System.out.println((fourTime - threeTime) / 10 + "nm");
        long fiveTime = System.nanoTime();
        for (int i = 0; i < 10; i++) {
            Cat cat3= heavyBeanCloneUtil.Clone(cat);
        }
        long sixTime = System.nanoTime();
        System.out.println((sixTime - fiveTime) / 10 + "nm");
    }
    @Test
    public void testThree() throws CloneNotSupportedException {
        //超小对象 new  > clone
        class Tree implements Cloneable {
            @Override
            protected Object clone() throws CloneNotSupportedException {
                return super.clone();
            }
        }
        long oneTime = System.nanoTime();
        Tree tree = new Tree();
        long twoTime = System.nanoTime();
        System.out.println(twoTime - oneTime + "nm");
        long threeTime = System.nanoTime();
        Tree t = (Tree) tree.clone();
        long fourTime = System.nanoTime();
        System.out.println(fourTime - threeTime + "nm");
    }
    public static void main(String[] args) throws CloneNotSupportedException{
        int count = 10000 * 1000;
        class Bean implements Cloneable {
            private String name;
            public Bean(String name) {
                this.name = name;
            }
            @Override
            protected Bean clone() throws CloneNotSupportedException {
                return (Bean) super.clone();
            }
        }
        long s1 = System.nanoTime();
        for (int i = 0; i < count; i++) {
            Bean bean = new Bean("ylWang");
        }
        long s2 = System.nanoTime();
        Bean bean = new Bean("ylWang");
        for (int i = 0; i < count; i++) {
            Bean b = bean.clone();
        }
        long s3 = System.nanoTime();
        System.out.println("new  = " + (s2 - s1)/count + "nm");
        System.out.println("clone = " + (s3 - s2)/count + "nm");
    }
}