--- /dev/null	2015-11-20 13:33:10.000000000 -0800
+++ new/src/java.desktop/share/classes/sun/java2d/marlin/stats/Monitor.java	2015-11-20 13:33:10.000000000 -0800
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 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 sun.java2d.marlin.stats;
+
+/**
+ * Generic monitor ie gathers time statistics as nanos.
+ */
+public final class Monitor extends StatLong {
+
+    private static final long INVALID = -1L;
+
+    private long start = INVALID;
+
+    public Monitor(final String name) {
+        super(name);
+    }
+
+    public void start() {
+        start = System.nanoTime();
+    }
+
+    public void stop() {
+        final long elapsed = System.nanoTime() - start;
+        if (start != INVALID && elapsed > 0l) {
+            add(elapsed);
+        }
+        start = INVALID;
+    }
+}
+