Bug 37884 Show Type hierarchy scalability problem
corner case but... 1) Open Object 2) select toString in the editor 3) ctrl-t 4) type T to filter the list ->this takes minutes The filtering is done after every keystroke. A first improvement is to do the refiltering after a time out. Another solution is to use the separate thread solution as is done in the ElementListSelectionDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaOutlineInformationControl.java
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package org.eclipse.jdt.internal.ui.text;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;