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diff --git a/benchmarks/src/benchmarks/regression/MutableIntBenchmark.java b/benchmarks/src/benchmarks/regression/MutableIntBenchmark.java
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+++ b/benchmarks/src/benchmarks/regression/MutableIntBenchmark.java
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+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package benchmarks.regression;
+
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+import com.google.caliper.SimpleBenchmark;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public final class MutableIntBenchmark extends SimpleBenchmark {
+
+    enum Kind {
+        ARRAY() {
+            int[] value = new int[1];
+
+            @Override void timeCreate(int reps) {
+                for (int i = 0; i < reps; i++) {
+                    value = new int[] { 5 };
+                }
+            }
+            @Override void timeIncrement(int reps) {
+                for (int i = 0; i < reps; i++) {
+                    value[0]++;
+                }
+            }
+            @Override int timeGet(int reps) {
+                int sum = 0;
+                for (int i = 0; i < reps; i++) {
+                    sum += value[0];
+                }
+                return sum;
+            }
+        },
+        ATOMIC() {
+            AtomicInteger value = new AtomicInteger();
+
+            @Override void timeCreate(int reps) {
+                for (int i = 0; i < reps; i++) {
+                    value = new AtomicInteger(5);
+                }
+            }
+            @Override void timeIncrement(int reps) {
+                for (int i = 0; i < reps; i++) {
+                    value.incrementAndGet();
+                }
+            }
+            @Override int timeGet(int reps) {
+                int sum = 0;
+                for (int i = 0; i < reps; i++) {
+                    sum += value.intValue();
+                }
+                return sum;
+            }
+        };
+
+        abstract void timeCreate(int reps);
+        abstract void timeIncrement(int reps);
+        abstract int timeGet(int reps);
+    }
+
+    @Param Kind kind;
+
+    public void timeCreate(int reps) {
+        kind.timeCreate(reps);
+    }
+
+    public void timeIncrement(int reps) {
+        kind.timeIncrement(reps);
+    }
+
+    public void timeGet(int reps) {
+        kind.timeGet(reps);
+    }
+
+    public static void main(String[] args) {
+        Runner.main(MutableIntBenchmark.class, args);
+    }
+}