Bug 89971 [Viewers] Viewers that use IViewerLabelProvider do too many instanceof checks
M6 Checking our viewer the calls to buildLabel are doing too many instanceof checks. As a result certain viewers (such as the table viewer) are twice as slow as they were in 3.0 due to these checks. I have written some performance suites to test the Table, Tree, List and Combo viewers. Table and Tree have this issue.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
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package org.eclipse.jface.viewers;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jface.util.Assert;
import org.eclipse.jface.util.IOpenEventListener;
import org.eclipse.jface.util.ListenerList;
import org.eclipse.jface.util.OpenStrategy;