--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.tck/src/com/oracle/truffle/tck/TimingDecorator.java	Fri Jun 12 17:02:36 2015 +0200
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.tck;
+
+import org.junit.runner.*;
+
+/**
+ * Timing support for JUnit test runs.
+ */
+class TimingDecorator extends TruffleJUnitRunListenerDecorator {
+
+    private long startTime;
+    private long classStartTime;
+
+    public TimingDecorator(TruffleJUnitRunListener l) {
+        super(l);
+    }
+
+    @Override
+    public void testClassStarted(Class<?> clazz) {
+        classStartTime = System.nanoTime();
+        super.testClassStarted(clazz);
+    }
+
+    @Override
+    public void testClassFinished(Class<?> clazz) {
+        long totalTime = System.nanoTime() - classStartTime;
+        super.testClassFinished(clazz);
+        getWriter().print(' ' + valueToString(totalTime));
+    }
+
+    @Override
+    public void testStarted(Description description) {
+        startTime = System.nanoTime();
+        super.testStarted(description);
+    }
+
+    @Override
+    public void testFinished(Description description) {
+        long totalTime = System.nanoTime() - startTime;
+        super.testFinished(description);
+        getWriter().print(" " + valueToString(totalTime));
+    }
+
+    private static String valueToString(long value) {
+        return String.format("%d.%d ms", value / 1000000, (value / 100000) % 10);
+    }
+
+}