You might want to just add this on to the one I created, Glen:
http://issues.apache.org/jira/browse/AXIS2-533 I include JDOM in my test
code there (using the Piccolo SAX parser), but didn't discuss the JDOM
results in the text since dom4j is generally faster and smaller.
- Dennis
Davanum Srinivas wrote:
Glen,
Could up please send the bigfile.xml as well? Better to do it via JIRA.
thanks,
dims
On 3/30/06, Glen Daniels <[EMAIL PROTECTED]> wrote:
Hi folks:
The following is a quick test which takes an XML input file, parses it,
and walks the tree collecting all text content. It does this using both
JDOM (note that you'll need the StAXBuilder and StAXTextModifier which
you can find at http://svn.woodstox.codehaus.org/utils/jdom/) and AXIOM,
100 times each, and then averages the timings. The code is as close to
identical as I could get for the two packages.
For the file I'm working with (about 150K) I'm seeing AXIOM get an
average time around 180ms, whereas JDOM comes in at around 77ms. The
strings match up. This could be better, because frankly JDOM is way
easier to use. :)
I think it might be time to integrate some performance testing into our
builds, and to do some optimization on AXIOM. I haven't yet looked at
comparing memory footprints, but may try to do that sometime soon.
--Glen
--------
import org.apache.axiom.om.OMXMLParserWrapper;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.impl.llom.factory.OMXMLBuilderFactory;
import org.jdom.input.StAXBuilder;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Content;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLInputFactory;
import java.io.FileInputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Date;
public class Test {
static class Timer {
long startTime;
long stopTime;
public void start() {
startTime = new Date().getTime();
}
public long stop() {
stopTime = new Date().getTime();
return (stopTime - startTime);
}
}
// A place to save the string length for comparison purposes
static int strLen = 0;
public static void main(String[] args) throws Exception {
// Replace with any big file
String FILENAME = "Scratch/bigfile.xml";
int NUM_RUNS = 100;
long accum = 0;
for (int i = 0; i < NUM_RUNS; i++) {
FileInputStream fis = new FileInputStream(FILENAME);
XMLStreamReader parser =
XMLInputFactory.newInstance().createXMLStreamReader(fis);
accum += runAXIOMTest(parser);
parser.close();
fis.close();
}
System.out.println("OM avg was " + (accum / NUM_RUNS) +
" (" + strLen + ")");
strLen = 0;
accum = 0;
for (int i = 0; i < NUM_RUNS; i++) {
FileInputStream fis = new FileInputStream(FILENAME);
XMLStreamReader parser =
XMLInputFactory.newInstance().createXMLStreamReader(fis);
accum += runJDOMTest(parser);
parser.close();
fis.close();
}
System.out.println("JDOM avg was " + (accum / NUM_RUNS) +
" (" + strLen + ")");
}
public static long runAXIOMTest(XMLStreamReader parser) throws
Exception {
Timer t = new Timer();
t.start();
OMXMLParserWrapper builder =
OMXMLBuilderFactory.createStAXOMBuilder(OMAbstractFactory.getOMFactory(),
parser);
OMElement root = builder.getDocumentElement();
StringBuffer buf = new StringBuffer();
genAXIOMString(root, buf);
long elapsed = t.stop();
if (strLen == 0) {
// System.out.println("[" + buf.toString() + "]");
strLen = buf.length();
}
return elapsed;
}
public static long runJDOMTest(XMLStreamReader parser) throws
Exception {
Timer t = new Timer();
t.start();
StAXBuilder builder = new StAXBuilder();
Document doc = builder.build(parser);
StringBuffer buf = new StringBuffer();
Element root = doc.getRootElement();
genJDOMString(root, buf);
long elapsed = t.stop();
if (strLen == 0) {
// System.out.println("[" + buf.toString() + "]");
strLen = buf.length();
}
return elapsed;
}
// These two methods do the exact same thing, one for AXIOM and one
// for JDOM. Walk the tree and collect all the text.
public static void genAXIOMString(OMElement el, StringBuffer buf) {
buf.append(el.getText());
Iterator i = el.getChildren();
while (i.hasNext()) {
OMNode node = (OMNode)i.next();
if (node instanceof OMElement) {
OMElement element = (OMElement) node;
genAXIOMString(element, buf);
}
}
}
public static void genJDOMString(Element el, StringBuffer buf) {
buf.append(el.getText());
List children = el.getChildren();
for (Iterator i = children.iterator(); i.hasNext();) {
Content content = (Content)i.next();
if (content instanceof Element) {
Element element = (Element)content;
genJDOMString(element, buf);
}
}
}
}
--
Davanum Srinivas : http://wso2.com/blogs/
