Poor performance with test...

[davidecr]

trying this...

long init = System.currentTimeMillis();
ObjectOutputStream dos = new JBossObjectOutputStream(new FileOutputStream("c:\\test.txt"));
dos.writeObject(opportunities);
dos.close();
File f = new File("c:\\test.txt");
System.out.println("result bytes = " + f.length());
System.out.println("result time = " + (System.currentTimeMillis() - init));

opportunities is an ArrayList filled with a javabean with no superclasses an using as fields primitives string and java.util.Date

with JBossObjectOutputStream has the result...
INFO: result bytes = 125880 (Constant)
INFO: result time = 828 (%)


with java.io.ObjectOutputStream has the result...
INFO: result bytes = 103723 (103723)
INFO: result time = 156 (%)

I'm doing something wrong??? as I don;t getting even the same performanceas normal serialization.

[clebert.suconic]

You always need a BufferedOutputStream and BufferedINputStream on JBossObjectOutputStream...

even the regular ObjectOutputStream will work better with a BufferedStream

There is another thread on this forum talking about this.


You should do:



long init = System.currentTimeMillis();
ObjectOutputStream dos = new JBossObjectOutputStream (new BufferedOutputStream(new FileOutputStream("c:\\test.txt")));
dos.writeObject(opportunities);
dos.close();
File f = new File("c:\\test.txt");
System.out.println("result bytes = " + f.length());
System.out.println("result time = " + (System.currentTimeMillis() - init));

[lxk123]

I have similar experience: this package is slower than standard JDK 1.4.2 and consuming more memory. Is there something wrong on the following code snippet?


---------------------
ByteArrayOutputStream bstream = new ByteArrayOutputStream();
org.jboss.serial.io.JBossObjectOutputStream out = new org.jboss.serial.io.JBossObjectOutputStream(bstream);

out.writeObject(obj);
out.close();

// Loading the memory block as an Object
ByteArrayInputStream binstream = new ByteArrayInputStream(bstream.toByteArray());
org.jboss.serial.io.JBossObjectInputStream oin = new org.jboss.serial.io.JBossObjectInputStream(binstream);

Object newobj = oin.readObject();

[clebert.suconic]

You are probably measuring classLoading time...

You need to ignore first measuring... considering only steady time.

[lxk123]

The measure is taking against 1000 runs of cloning a same object, and the class loading should not be a big impact here.

By the way, the smartClone method provided works great. On my test, it is more than twice as fast as the standard serialization.

-------------
ByteArrayOutputStream bstream = new ByteArrayOutputStream();
org.jboss.serial.io.JBossObjectOutputStream out = new org.jboss.serial.io.JBossObjectOutputStream(bstream);

Object newobj = out.smartClone(obj);

[clebert.suconic]

On the Benchmarks I have done I always ignored 100 first elements to be fair.. not computing ClassLoading as JDK classes get sometimes pre-loaded (Specially Serialization)

Also.. I always used the same ByteArrrayOutputStream (by calling reset)...

And of course my Java and JBoss examples were the same. I needed to be fair on both sides.