--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/micro/org/openjdk/bench/vm/lang/InstanceOf.java	Fri Nov 16 23:39:51 2018 +0100
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2014 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.
+ *
+ * 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 org.openjdk.bench.vm.lang;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OperationsPerInvocation;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Tests various usages of instanceof.
+ */
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class InstanceOf {
+
+    private static final int NOOFOBJECTS = 100;
+    private static final int NULLRATIO = 3;
+
+    public Date[] dateArray;
+    public Object[] objectArray;
+
+    @Setup
+    public void setup() {
+        dateArray = new Date[NOOFOBJECTS * NULLRATIO];
+        for (int i = 0; i < NOOFOBJECTS * NULLRATIO; i += NULLRATIO) {
+            dateArray[i] = new Date();
+        }
+        objectArray = dateArray;
+    }
+
+    /**
+     * Performs "instanceof Cloneable" on objects that definitely are of that interface. It is not clear however whether
+     * the objects are null or not, therefore a simple nullcheck is all that should be left of here.
+     */
+    @Benchmark
+    @OperationsPerInvocation((NOOFOBJECTS * NULLRATIO))
+    public int instanceOfInterfacePartialRemove() {
+        int dummy = 0;
+        Date[] localArray = dateArray;
+        for (int i = 0; i < NOOFOBJECTS * NULLRATIO; i++) {
+            if (localArray[i] instanceof Cloneable) {
+                dummy++;
+            }
+        }
+        return dummy;
+    }
+
+    /**
+     * Performs three serial instanceof statements on the same object for three different interfaces. The objects are
+     * 50% null, and all non-null are instanceof the last interface.
+     */
+    @Benchmark
+    @OperationsPerInvocation((NOOFOBJECTS * NULLRATIO))
+    public int instanceOfInterfaceSerial() {
+        int dummy = 0;
+        Object[] localArray = objectArray;
+        for (int i = 0; i < NOOFOBJECTS * NULLRATIO; i++) {
+            if (localArray[i] instanceof Runnable) {
+                dummy += 1000;
+            } else if (localArray[i] instanceof CharSequence) {
+                dummy += 2000;
+            } else if (localArray[i] instanceof Serializable) {
+                dummy++;
+            }
+        }
+        return dummy;
+    }
+}