Bug 109041 [implementation] Occurrence finders should not compute current node each time
I20050906-1200 This is a minor performance improvement item: currently each occurrence finder computes the node at the caret location via NodeFinder. It would be more efficient to compute the node once and initialize each occurrence finder with that node.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
if (e != null) {
				while (e.hasNext()) {
					Object o= e.next();
					if (o instanceof MarkerAnnotation) {
						super.updateMarkerViews((MarkerAnnotation)o);
						return;
					}
				}
			}
			return;
		}
		super.updateMarkerViews(annotation);
	}
	/**
	 * Finds and marks occurrence annotations.
	 *
	 * @since 3.0
	 */
	class OccurrencesFinderJob extends Job {
		private IDocument fDocument;
		private ISelection fSelection;
		private ISelectionValidator fPostSelectionValidator;
		private boolean fCanceled= false;
		private IProgressMonitor fProgressMonitor;
		private Position[] fPositions;
		public OccurrencesFinderJob(IDocument document, Position[] positions, ISelection selection) {
			super(JavaEditorMessages.JavaEditor_markOccurrences_job_name);
			fDocument= document;
			fSelection= selection;
			fPositions= positions;