FilterChain, SeamFilter and very large List

[alteskind]

When I fill a list with quite a lot of objects (100000 - 200000) and then try to link to another JSF page I observe quite a strange behaviour.

The performance is fine until I try to link to this other JSP page - but then the execution time of javax.servlet.FilterChain.doFilter is between 200 - 500 seconds.

Here's is my method:

public String startSearch() {


 timeDeposits = new LinkedList<TimeDeposit>();


 String sql = "SELECT * FROM TIMEDEPOSIT" 

 Query query = entityManager.createNativeQuery(sql);

 List<Object> list = (List) query.getResultList(); // 100000-200000 results


 if (list.size() > 0) {

  timeDeposit.setAccountNumber((BigDecimal) row[0]);

  timeDeposit.setCustomerNumber((BigDecimal) row[1]);

  .

  .

  .

 }

 // Until this line performance is fine


 return "data.xhtml"; // javax.servlet.FilterChain.doFilter() seems to get out of control ;-)

}

Two screenshots of JProfiler to visualize this problem:

http://img406.imageshack.us/my.php?image=jprofiler1ix5.png

http://img241.imageshack.us/my.php?image=jprofiler2qy1.png

What does this FilterChain/SeamFilter do? Why is the execution time that long? When I fill the List with less objects (1000) I don’t get this problem.

Thanks :-)

altes-kind

[pmuir]

All of Seam when used with JSF is executed inside Servlet filters. So you have a performance problem somewhere in your app...

Try harder to isolate the problem.

[mail.micke]

Have you modified the ajax4jsf filter settings in your web.xml?

I noticed a fairly large performance boost buy configuring it to use the NEKO filter (when rendering a lot of output)!

Have look here in the RichFaces docs

This is just a guess based on the the ajax4jsf filter show in the profiler output.

Good luck,
Micke