java原生序列化和Kryo（dubbo）序列化性能比较

客官°小女子只卖身不卖艺 2022-06-08 04:41 190阅读 0赞

简介

最近几年，各种新的高效序列化方式层出不穷，不断刷新序列化性能的上限，最典型的包括：

*  专门针对Java语言的：Kryo，FST等等
 *  跨语言的：Protostuff，ProtoBuf，Thrift，Avro，MsgPack等等

这些序列化方式的性能多数都显著优于hessian2（甚至包括尚未成熟的dubbo序列化）。有鉴于此，我们为dubbo引入Kryo和FST这 两种高效Java序列化实现，来逐步取代hessian2。其中，Kryo是一种非常成熟的序列化实现，已经在Twitter、Groupon、 Yahoo以及多个著名开源项目（如Hive、Storm）中广泛的使用。而FST是一种较新的序列化实现，目前还缺乏足够多的成熟使用案例，但它还是非 常有前途的，下面我们比较下，java原生序列化Kryo序列化性能比较

1、实体类 Simple.java

![复制代码][copycode.gif]

package bhz.entity;
    
    import java.io.Serializable;
    import java.util.Map;
    
    public class Simple  implements Serializable
    {  
         private static final long serialVersionUID = -4914434736682797743L;  
         private String name;  
         private int age;  
         private Map<String,Integer> map;  
         public Simple(){  
      
         }  
         public Simple(String name,int age,Map<String,Integer> map){  
             this.name = name;  
             this.age = age;  
             this.map = map;  
         }  
      
         public String getName() {  
           return name;  
         }  
      
         public void setName(String name) {  
            this.name = name;  
         }  
      
         public int getAge() {  
            return age;  
         }  
      
         public void setAge(int age) {  
            this.age = age;  
         }  
      
         public Map<String, Integer> getMap() {  
            return map;  
         }  
      
         public void setMap(Map<String, Integer> map) {  
            this.map = map;  
         }  
      
      
    }

![复制代码][copycode.gif]

2、java原生序列化 OriginalSerializable.java

![复制代码][copycode.gif]

package bhz.test;
    
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    import java.util.HashMap;
    import java.util.Map;
    
    import bhz.entity.Simple;
    
    public class OriginalSerializable {  
          
        public static void main(String[] args) throws IOException, ClassNotFoundException {  
            long start =  System.currentTimeMillis();  
            setSerializableObject();  
            System.out.println("java原生序列化时间:" + (System.currentTimeMillis() - start) + " ms" );    
            start =  System.currentTimeMillis();  
            getSerializableObject();  
            System.out.println("java原生反序列化时间:" + (System.currentTimeMillis() - start) + " ms");  
        }  
      
        public static void setSerializableObject() throws IOException{  
      
            FileOutputStream fo = new FileOutputStream("D:/file2.bin");  
      
            ObjectOutputStream so = new ObjectOutputStream(fo);  
      
            for (int i = 0; i < 100000; i++) {  
                Map<String,Integer> map = new HashMap<String, Integer>(2);  
                map.put("zhang0", i);  
                map.put("zhang1", i);  
                so.writeObject(new Simple("zhang"+i,(i+1),map));  
            }  
            so.flush();  
            so.close();  
        }  
      
        public static void getSerializableObject(){  
             FileInputStream fi;  
            try {  
                fi = new FileInputStream("D:/file2.bin");  
                ObjectInputStream si = new ObjectInputStream(fi);  
      
                Simple simple =null;  
                while((simple=(Simple)si.readObject()) != null){  
                    //System.out.println(simple.getAge() + "  " + simple.getName());  
                }  
                fi.close();  
                si.close();  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
            } catch (IOException e) {  
                //e.printStackTrace();  
            } catch (ClassNotFoundException e) {  
                e.printStackTrace();  
            }  
    
        }  
      
    }

![复制代码][copycode.gif]

3、kyro序列化 KyroSerializable.java

![复制代码][copycode.gif]

package bhz.test;
    
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.objenesis.strategy.StdInstantiatorStrategy;
    
    import bhz.entity.Simple;
    
    import com.esotericsoftware.kryo.Kryo;
    import com.esotericsoftware.kryo.KryoException;
    import com.esotericsoftware.kryo.io.Input;
    import com.esotericsoftware.kryo.io.Output;
    
    public class KyroSerializable {  
          
        public static void main(String[] args) throws IOException {  
            long start =  System.currentTimeMillis();  
            setSerializableObject();  
            System.out.println("Kryo 序列化时间:" + (System.currentTimeMillis() - start) + " ms" );  
            start =  System.currentTimeMillis();  
            getSerializableObject();  
            System.out.println("Kryo 反序列化时间:" + (System.currentTimeMillis() - start) + " ms");  
      
        }  
      
        public static void setSerializableObject() throws FileNotFoundException{  
      
            Kryo kryo = new Kryo();  
            kryo.setReferences(false);  
            kryo.setRegistrationRequired(false);  
            kryo.setInstantiatorStrategy(new StdInstantiatorStrategy());  
            kryo.register(Simple.class);  
            Output output = new Output(new FileOutputStream("D:/file1.bin"));  
            for (int i = 0; i < 100000; i++) {  
                Map<String,Integer> map = new HashMap<String, Integer>(2);  
                map.put("zhang0", i);  
                map.put("zhang1", i);  
                kryo.writeObject(output, new Simple("zhang"+i,(i+1),map));  
            }  
            output.flush();  
            output.close();  
        }  
      
      
        public static void getSerializableObject(){  
            Kryo kryo = new Kryo();  
            kryo.setReferences(false);  
            kryo.setRegistrationRequired(false);  
            kryo.setInstantiatorStrategy(new StdInstantiatorStrategy());  
            Input input;  
            try {  
                input = new Input(new FileInputStream("D:/file1.bin"));  
                Simple simple =null;  
                while((simple=kryo.readObject(input, Simple.class)) != null){  
                    //System.out.println(simple.getAge() + "  " + simple.getName() + "  " + simple.getMap().toString());  
                }  
      
                input.close();  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
            } catch(KryoException e){  
      
            }  
        }  
      
    }

[copycode.gif]: /images/20220608/949ccffafff44d5592654574e4e40172.png