Compute Java heap summary in a worker thread

Author: jisedlac

visualvm/heapviewer/src/com/sun/tools/visualvm/heapviewer/java/impl/JavaHeapSummaryView.java

@@ -82,11 +82,15 @@ public class JavaHeapSummaryView extends HeapViewerFeature {
     private JComponent component;
     private ProfilerToolbar toolbar;
 
+    private String summaryText;
+    
 
     public JavaHeapSummaryView(HeapContext context) {
         super("java_heap_summary", Bundle.JavaHeapSummaryView_Name(), Bundle.JavaHeapSummaryView_Description(),
                Icons.getIcon(HeapWalkerIcons.PROPERTIES), 100); // NOI18N
         this.context = context;
+        
+        this.summaryText = createSummary();
     }
 
 
@@ -110,12 +114,13 @@ private void init() {
         toolbar = ProfilerToolbar.create(false);
 
 
-        HTMLTextArea text = new HTMLTextArea();
-        text.setText(createSummary());
+        HTMLTextArea text = new HTMLTextArea(summaryText);
         text.setCaretPosition(0);
         text.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
 
         component = new ScrollableContainer(text);
+        
+        summaryText = null;
     }