Bug 27075 ViewerSorter could maybe lazily initialize Collator
calling JavaElementSorter creates a lot of new objects (ViewerSorter calls Collator.getInstance() which is the culprit) so maybe fSorter could be initialized lazily
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/MembersOrderPreferencePage.java
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 * Copyright (c) 2000, 2002 International Business Machines Corp. and others.
 * All rights reserved. This program and the accompanying materials 
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package org.eclipse.jdt.internal.ui.preferences;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;