空字符串用equals比较的时间和==（等等于）比较的时间哪个更快

package com.lxhw.common.isnull;

import com.alibaba.fastjson.JSONObject;

/**
 * Created by chirszh on 2017-09-25.
 */

public class JsonRewrite  extends JSONObject{
   
    public static void main(String[] args){
        long startTime = System.currentTimeMillis(); // 获取开始时间
        JsonRewrite jsRewrite = new JsonRewrite();
       
        JSONObject bbb = new JSONObject();
        bbb.put("bbb","");

        Double test1 = ("".equals(bbb.getString("bbb" ))?0D:bbb.getDouble("bbb"));
      
        System.out.println("test1-->"+test1);
    
        long endTime = System.currentTimeMillis(); // 获取结束时间
        System.out.println("程序运行时间： " + (endTime - startTime) + "ms");

    }
}

package com.lxhw.common.isnull;

import com.alibaba.fastjson.JSONObject;

/**
 * Created by chirszh on 2017-09-25.
 */

public class JsonRewrite  extends JSONObject{
   
    public static void main(String[] args){
        long startTime = System.currentTimeMillis(); // 获取开始时间
        JsonRewrite jsRewrite = new JsonRewrite();
       
        JSONObject bbb = new JSONObject();
        bbb.put("bbb","");

      
        Double test2 = (bbb.getDouble("bbb" )==null?0D:bbb.getDouble("bbb"));
    
        System.out.println("test2-->"+test2);
        long endTime = System.currentTimeMillis(); // 获取结束时间
        System.out.println("程序运行时间： " + (endTime - startTime) + "ms");

    }
}