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
*/
	public final Map getPartialMatches(final TriggerSequence trigger) {
		final Map partialMatches = (Map) getPrefixTable().get(trigger);
		if (partialMatches == null) {
			return Collections.EMPTY_MAP;
		}
		return partialMatches;
	}
	/**
	 * <p>
	 * Returns the command identifier for the active binding matching this
	 * trigger, if any.
	 * </p>
	 * <p>
	 * This method completes in <code>O(1)</code>. If the bindings aren't
	 * currently 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
	 * number of deletion markers.
	 * </p>
	 * 
	 * @param trigger
	 *            The trigger to match; may be <code>null</code>.
	 * @return The command identifier that matches, if any; <code>null</code>
	 *         otherwise.
	 */
	public final String getPerfectMatch(final TriggerSequence trigger) {
		return (String) getActiveBindings().get(trigger);
	}
	/**
	 * <p>