[Xerces-J] problem

[Mikael Helbo Kjær <mh...@dia.dk>]

Hi everyone. 
I`m developing a Java Xml application and I`m testing different Java XML
parser. I`ve tested the Oracle XML Parser (fastest so far, but uses a lot of
memory) and Suns jaxp (slower, but parses big files fastest) and I`m of
course also testing the Xerces-J parser (I`ve followed the project since
December), but I´ve encountered a major problem when parsing
(non-validating) a 9 MB file, the parsing is incredibly slow (995562 ms),
which is clearly unacceptable for any application in terms of response time.
I`ve used the following code and it runs in a Jdk1.2.2 (using HotSpot 1.0.1)
under Window 2000 Server Edition:
//XercesTest.java
import org.w3c.dom.*;
import org.apache.xerces.parsers.*;
import org.xml.sax.InputSource;

import java.io.*;
import java.net.*;

public class XercesTest extends Object
{
	static public void main(String[] argv)
	{
		long now, after, usedtime;
		try{
			InputSource biginput = new InputSource(new
FileInputStream("C:\\kurs.xml"));
		
			DOMParser parser = new DOMParser();
			parser.setValidating(false);
			
			now = System.currentTimeMillis();
			parser.parse(biginput);
			after = System.currentTimeMillis();
			usedtime = after-now;
			System.out.println("Kurs.xml: "+usedtime);
			
			parser.reset();
		}catch( Exception e )
		{
			e.printStackTrace();
		}
	}
}
I don`t know if I`m doing something wrong or if this is a bug...

Mikael Helbo Kjær
Software Developer @ DIA a/s

Re: [Xerces-J] problem

[Wong Kok Wai <wo...@pacific.net.sg>]

Two ways you can try:

1) Wrap your FileInputStream with a BufferedInputStream, like:

                        InputSource biginput = new InputSource(new
BufferedInputStream(new
FileInputStream("C:\\kurs.xml")));

2) Use SAX

Mikael Helbo Kjær wrote:

> Hi everyone.
> I`m developing a Java Xml application and I`m testing different Java XML
> parser. I`ve tested the Oracle XML Parser (fastest so far, but uses a lot of
> memory) and Suns jaxp (slower, but parses big files fastest) and I`m of
> course also testing the Xerces-J parser (I`ve followed the project since
> December), but I´ve encountered a major problem when parsing
> (non-validating) a 9 MB file, the parsing is incredibly slow (995562 ms),
> which is clearly unacceptable for any application in terms of response time.

RE: [Xerces-J] problem

["George T. Joseph" <gt...@peakin.com>]

Try turning HotSpot off and allocating a larger initial heap.

java -classic -Xms20m .....

george

-----Original Message-----
From: Mikael Helbo Kjær [mailto:mhk@dia.dk]
Sent: Friday, February 18, 2000 7:22 AM
To: 'xerces-dev@xml.apache.org'
Subject: [Xerces-J] problem


Hi everyone.
I`m developing a Java Xml application and I`m testing different Java XML
parser. I`ve tested the Oracle XML Parser (fastest so far, but uses a lot of
memory) and Suns jaxp (slower, but parses big files fastest) and I`m of
course also testing the Xerces-J parser (I`ve followed the project since
December), but I´ve encountered a major problem when parsing
(non-validating) a 9 MB file, the parsing is incredibly slow (995562 ms),
which is clearly unacceptable for any application in terms of response time.
I`ve used the following code and it runs in a Jdk1.2.2 (using HotSpot 1.0.1)
under Window 2000 Server Edition:
//XercesTest.java
import org.w3c.dom.*;
import org.apache.xerces.parsers.*;
import org.xml.sax.InputSource;

import java.io.*;
import java.net.*;

public class XercesTest extends Object
{
	static public void main(String[] argv)
	{
		long now, after, usedtime;
		try{
			InputSource biginput = new InputSource(new
FileInputStream("C:\\kurs.xml"));

			DOMParser parser = new DOMParser();
			parser.setValidating(false);

			now = System.currentTimeMillis();
			parser.parse(biginput);
			after = System.currentTimeMillis();
			usedtime = after-now;
			System.out.println("Kurs.xml: "+usedtime);

			parser.reset();
		}catch( Exception e )
		{
			e.printStackTrace();
		}
	}
}
I don`t know if I`m doing something wrong or if this is a bug...

Mikael Helbo Kjær
Software Developer @ DIA a/s