标签：anti als div std integer 项目 twitter stdin avr
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：
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
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; } }
2、java原生序列化 OriginalSerializable.java
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(); } } }
3、kyro序列化 KyroSerializable.java
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){ } } }
4、测试结果对比
java原生序列化时间:8281 ms
java原生反序列化时间:5899 ms
和
Kryo 序列化时间:630 ms
Kryo 反序列化时间:15 ms
经过对比，可以发现kryo是java原生序列化性能十几倍
标签：anti als div std integer 项目 twitter stdin avr
原文地址：http://www.cnblogs.com/520playboy/p/6341490.html
