JBoss Serialization is very slow?

[liudan2005]

I'm using JBossObjectOutputStream and use writeObject(...) to a FielOutputStream. The result show sun provided serialization is about 4 times faster than jboss's.

Here is my code(very simple code):

FileOutputStream fileOutputStream=new FileOutputStream(file);
final ObjectOutputStream out = new JBossObjectOutputStream(fileOutputStream);
final MyObject event = new MyObject(new Long(9999),new Date(),new Date(),"string1","string2",123,234,true,345);

long firstTimeStamp=System.currentTimeMillis();

 for(int i=0;i<20000;i++){

 out.reset();
 out.writeObject(event);
 out.flush();
 }


long timeSpent=System.currentTimeMillis()-firstTimeStamp;
System.out.println(timeSpent);

Any ideas? Is there anything i'm doing wrong?

[clebert.suconic]

You are measuring ClassLoading time of JBossSerialization also.

You should do something like:

FileOutputStream fileOutputStream=new FileOutputStream(file);
final ObjectOutputStream out = new JBossObjectOutputStream(fileOutputStream);
final MyObject event = new MyObject(new Long(9999),new Date(),new Date(),"string1","string2",123,234,true,345);

long firstTimeStamp=0;

 for(int i=0;i<20000;i++){
 if (i==1000)
 {
 firstTimeStamp=System.currentTimeMillis();
 }
 out.reset();
 out.writeObject(event);
 out.flush();
 }


long timeSpent=System.currentTimeMillis()-firstTimeStamp;
System.out.println(timeSpent);

What really matters in a sytem is a steady state. If you need to measure Loading Time there is no way to compete with Sun JDK's, as I can't modify the JVM to pre-load JBossSerialization.

[liudan2005]

I've modified my code as you suggested that start counting from 1000th call. Here is the average result I get (The Sun Jdk is about 4 times faster):

JBoss Serialization...
5625 ms

Sun Serialization...
1415 ms

I'm using jdk1.4.2_08 + jboss-serialization-1.0.0.GA

Any ideas?

[liudan2005]

tried jboss-serialization-1.0.1.GA and still no luck.

[clebert.suconic]

You need to use a BufferedOutputStream
Even javaSerialization works better with the Buffer.

This is because JavaSErialization has an internal buffer. JBossSErialization not.

jboss=330
java=351

public class MyTest extends TestCase
{

 static class MyObject implements Serializable
 {

 Long along;
 Date adate;
 Date anotherdate;
 String astring;
 String anotherstring;
 int a;
 int b;
 boolean somea;
 int c;
 public int getA() {
 return a;
 }
 public void setA(int a) {
 this.a = a;
 }
 public Date getAdate() {
 return adate;
 }
 public void setAdate(Date adate) {
 this.adate = adate;
 }
 public Long getAlong() {
 return along;
 }
 public void setAlong(Long along) {
 this.along = along;
 }
 public Date getAnotherdate() {
 return anotherdate;
 }
 public void setAnotherdate(Date anotherdate) {
 this.anotherdate = anotherdate;
 }
 public String getAnotherstring() {
 return anotherstring;
 }
 public void setAnotherstring(String anotherstring) {
 this.anotherstring = anotherstring;
 }
 public String getAstring() {
 return astring;
 }
 public void setAstring(String astring) {
 this.astring = astring;
 }
 public int getB() {
 return b;
 }
 public void setB(int b) {
 this.b = b;
 }
 public int getC() {
 return c;
 }
 public void setC(int c) {
 this.c = c;
 }
 public boolean isSomea() {
 return somea;
 }
 public void setSomea(boolean somea) {
 this.somea = somea;
 }
 public MyObject(Long along, Date adate, Date anotherdate, String astring, String anotherstring, int a, int b, boolean somea, int c) {
 super();
 this.along = along;
 this.adate = adate;
 this.anotherdate = anotherdate;
 this.astring = astring;
 this.anotherstring = anotherstring;
 this.a = a;
 this.b = b;
 this.somea = somea;
 this.c = c;
 }
 }

 public static boolean useBuffer=true;

 public void testJBoss() throws Exception
 {
 File file=new File("/tmp/jboss.ser");
 FileOutputStream fileOutputStream=new FileOutputStream(file);
 BufferedOutputStream buffOut = new BufferedOutputStream(fileOutputStream);
 ObjectOutputStream out = null;
 if (useBuffer)
 {
 out = new JBossObjectOutputStream(buffOut);
 }
 else
 {
 out = new JBossObjectOutputStream(fileOutputStream);
 }
 final MyObject event = new MyObject(new Long(9999),new Date(),new Date(),"string1","string2",123,234,true,345);

 long firstTimeStamp=0;

 for(int i=0;i<20000;i++){
 if (i==1000)
 {
 firstTimeStamp = System.currentTimeMillis();
 }
 out.reset();
 out.writeObject(event);
 out.flush();
 }


 long timeSpent=System.currentTimeMillis()-firstTimeStamp;
 System.out.println("jboss="+timeSpent);



 }
 public void testJava() throws Exception
 {
 File file=new File("/tmp/java.ser");
 FileOutputStream fileOutputStream=new FileOutputStream(file);
 BufferedOutputStream buffOut = new BufferedOutputStream(fileOutputStream);
 ObjectOutputStream out = null;
 if (useBuffer)
 {
 out = new ObjectOutputStream(buffOut);
 }
 else
 {
 out = new ObjectOutputStream(fileOutputStream);
 }
 final MyObject event = new MyObject(new Long(9999),new Date(),new Date(),"string1","string2",123,234,true,345);

 long firstTimeStamp=0;

 for(int i=0;i<20000;i++){
 if (i==1000)
 {
 firstTimeStamp = System.currentTimeMillis();
 }
 out.reset();
 out.writeObject(event);
 out.flush();
 }


 long timeSpent=System.currentTimeMillis()-firstTimeStamp;
 System.out.println("java=" + timeSpent);



 }
}

[liudan2005]

Changing to use BufferedOutputStream and it now flys. JBoss Serialization runs 70% faster than sun jdk's. Great stuff ! Thanks Clebert.

Are there any other JBoss Serialization performance turning tips? I can hardly find any document talking about this at moment.

[clebert.suconic]

Thanks a lot for your post.

I'm preparing a docbook for JBossSerialization. Should be ready soon. (in two or three weeks probably). After JBossWorld. (I'm kind of too busy now becuase of that).


Meanwhile I have my blog post aboug jboss serialization:

http://jboss.org/jbossBlog/blog/clebert/

[slump]

Hi, clebert:

I just copy your code and run the test
but the result is:
jboss=644
java=557

I have run it more than 10 times , the reuslt is similar

I use RHEL4 and jdk 1.5.0_06

is there something I missed?

and I found that if there isn't log4j.properties, the jboss code become very slow (2333ms), so I think you should put the note in the README

[clebert.suconic]

aha....

maybe they fixed their stuff:

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5056445