Bug 84912 [KeyBindings] performance: Lots of garbage when editor gains/loses focus
build i0208 Not sure where to enter this report. Adding Tod and John to CC as they will be involve in performance work this release. I have the Platform/UI heap usage plug-in installed. I notice that when I switch focus from the editor to a view (e.g. Outline), the heap usage increases by a meg or 2. Putting focus back to the editor does the same. This happens with both the text editor and more prominatly with the Java editor. It doesn't matter if the view is docked or is a fast view.
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
* </p>
	 * <p>
	 * The time this method takes to complete is dependent on external
	 * listeners.
	 * </p>
	 * 
	 * @param event
	 *            The event to send to all of the listeners; must not be
	 *            <code>null</code>.
	 */
	private final void fireBindingManagerChanged(final BindingManagerEvent event) {
		if (event == null)
			throw new NullPointerException();
		if (listeners != null) {
			final Iterator listenerItr = listeners.iterator();
			while (listenerItr.hasNext()) {
				final IBindingManagerListener listener = (IBindingManagerListener) listenerItr
						.next();
				listener.bindingManagerChanged(event);
			}
		}
	}
	/**
	 * <p>
	 * Returns the active bindings.
	 * </p>
	 * <p>
	 * This method completes in <code>O(1)</code>. If the active bindings are
	 * not yet computed, then this completes in <code>O(n+mn)</code>, where
	 * <code>n</code> is the number of bindings and <code>m</code> is the