memory leak in TabLayoutPanel?

Hello,
we develop large application where is used TabLayoutPanel very often -
everything is opened in tab.
I noticed that in IE (8,9) is consuming of memory very big and IE
slows down. If I watch using memory of IE in task manager I noticed
that every opened tab consumed memory but after closing tab - no
memory is released.
I tried to search where is problem. I wrote this small program which
should test releasing memory after closing tab:

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.LayoutPanel;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.TabLayoutPanel;

public class Tester implements EntryPoint {

//Simple label with huge consuming of memoty
private static class TestLabel extends Label {
int MAX = 10000000;
private int[] empty = new int[MAX];
public TestLabel() {
super("test");
for (int cnt=0;cnt<MAX;cnt++){
empty[cnt]=0;
}
}
}

public void onModuleLoad() {
final FlowPanel fp = new FlowPanel();
testLeak(fp);

RootLayoutPanel.get().add(fp);
}

private void testLeak(final FlowPanel fp) {
final TabLayoutPanel tp = new TabLayoutPanel(30, Unit.PX);
//final FlowPanel tp = new FlowPanel();
tp.setSize("800px", "400px");
fp.add(tp);

//button for performin garbage collection
Button b = new Button("Garbage collector");
fp.add(b);
b.addClickHandler(new ClickHandler() {

@Override
public void onClick(ClickEvent event) {
runGarbage();
}
});

//button for remove first component
Button deleteButton = new Button("delete tab");
fp.add(deleteButton);
deleteButton.addClickHandler(new ClickHandler() {

@Override
public void onClick(ClickEvent event) {
tp.remove(0);
}
});

//add widget
Button widgetB = new Button("Add widget");
fp.add(widgetB);
widgetB.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
tp.add(new TestLabel());
}
});
}

public native static void runGarbage()
/*-{
$wnd.CollectGarbage();
}-*/;
}

I created TestLabel widget which is simple Label but which allocated
some memory, to be able to notice creating widget in taskmanager. I
created several tabs with this memory-consuming-widget, after i
removed from tabLayoutPanel every added tab a I didn't noticed any
releasing of memory. When I run garbage collector manually by method
runGarbage() nothing happed. When I replace TabLayoutPanel with
FlowPanel releasing memory is OK.
Is this memory leak? Do you have similar experience?

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.