Performance issue on BasicService.showDocument

* FULL PRODUCT VERSION :
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b07)
Java HotSpot(TM) 64-Bit Server VM (build 17.0-b17, mixed mode)

* ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [version 6.1.7600]
Microsoft Windows XP [version 5.1.2600]

* A DESCRIPTION OF THE PROBLEM :
We identified a performance regression affecting any version of Java 6 compared to Java 5.

Using Java 5, a call to BasicService.showDocument takes few milliseconds, using java 6, it takes more than 5 seconds.

* STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Simply use the showDocument method in a Java WebStart application, capture the time this method takes to execute.

* EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Trace of the provided sample code using Java 5 (any version)

Write file on disk jsp.txt = 15ms
Basic service lookup : 0ms
Show document with Java webstart (jsp.txt) = 0ms
ACTUAL -
Trace of the provided sample code using Java 6 (any version):

Write file on disk jsp.txt = 47ms
Basic service lookup : 0ms
Show document with Java webstart (jsp.txt) = 4531ms

* REPRODUCIBILITY :
This bug can be reproduced always. A full test case is attached:

---------- BEGIN SOURCE ----------
Here is an excerpt of an application that recreates the problem.

long startBasicServiceLookup = System.currentTimeMillis();
BasicService bs = (BasicService) ServiceManager.lookup("javax.jnlp.BasicService");
long endBasicServiceLookup = System.currentTimeMillis();
log.append("Basic service lookup : " + (endBasicServiceLookup-startBasicServiceLookup) + "ms"+newline);
                     
long startShowDocument = System.currentTimeMillis();
bs.showDocument(file);
                     
                  
long endShowDocument = System.currentTimeMillis();
log.append("Show document with Java webstart ("+ fileContents.getName() +") = " + (endShowDocument-startShowDocument) + "ms"+newline);
---------- END SOURCE ----------