diff --git a/test/InterfaceTest/InterfaceTest.java b/test/InterfaceTest/InterfaceTest.java
new file mode 100644
index 0000000..ed18eb3
--- /dev/null
+++ b/test/InterfaceTest/InterfaceTest.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import java.util.Map;
+import java.util.HashMap;
+
+class InterfaceTest {
+
+  public static long test_virtual(HashMap map) {
+    Integer intobj = new Integer(0);
+    String s = "asdf";
+    long start = System.currentTimeMillis();
+    for (int i = 0; i < 1000000; i++) {
+        map.put(intobj, s);
+    }
+    long end = System.currentTimeMillis();
+    return (end - start);
+  }
+
+  public static long test_interface(Map map) {
+    Integer intobj = new Integer(0);
+    String s = "asdf";
+    long start = System.currentTimeMillis();
+    for (int i = 0; i < 1000000; i++) {
+        map.put(intobj, s);
+    }
+    long end = System.currentTimeMillis();
+    return (end - start);
+  }
+
+  public static void main(String[] args) {
+    HashMap hashmap = new HashMap();
+    long elapsed = test_virtual(hashmap);
+    System.logI("virtual map put: " + elapsed);
+    hashmap.clear();
+
+    elapsed = test_interface(hashmap);
+    System.logI("interface map put: " + elapsed);
+  }
+}