Usage of net.sf.saxon.TransformerFactoryImpl

[Nitinkcv]

Hi all,

I have a xsl and xml file which is transformed to a particular format. I make use of the net.sf.saxon.Tr ansformerFactor yImpl to do my transformation.

I'm actually timing the transformations to see how long they take. So basically i do a transformation of a file once, ten times and then 1000 times to see how long it takes.

Basically i put a timer statement before the for loop and a timer after the for loop to find out the difference.

This is part of my code:

 
public static void main(String args[]) {
		 System.setProperty("javax.xml.transform.TransformerFactory","net.sf.saxon.TransformerFactoryImpl");
   test(10);
   test(10);
   test(1000);
}

public static void test(int n){
	 long start=0;
	 long end =0;

	start = new Date().getTime();
	for (int i=0; i<n ; i++){
		process();
	}
	end = new Date().getTime();
	System.out.println("No of times run-->"+n);
	System.out.println(end-start);
}

The timings that i get are somewhat odd.

No of times run-->1
469
No of times run-->10
218
No of times run-->1000
8468

My only only assumption why it takes 469 ms to run it once and 218ms to run it 10 times, is something to do with initializing the transformation engine??

Could anyone please shed some light?
Nitin

[jkmyoung]

The load time of the class is significant. Run it once to get the load time out of the way and then run it once again to get the actual timing. It is probable that there is a singleton which has to create itself before running the first time, but then it exists for subsequent runs.