diff --git a/metrics/pom.xml b/metrics/pom.xml
new file mode 100644
index 00000000..a838a160
--- /dev/null
+++ b/metrics/pom.xml
@@ -0,0 +1,100 @@
+
+ 4.0.0
+ com.google.code.gson
+ gson-metrics
+ jar
+ 1.0-SNAPSHOT
+ 2011
+ Gson Metrics
+
+ org.sonatype.oss
+ oss-parent
+ 5
+
+ http://code.google.com/p/google-gson/
+ Performance Metrics for Google Gson library
+
+
+ The Apache Software License, Version 2.0
+ http://www.apache.org/licenses/LICENSE-2.0.txt
+ repo
+
+
+
+ scm:svn:http://google-gson.googlecode.com/svn/trunk/metrics
+ scm:svn:https://google-gson.googlecode.com/svn/trunk/metrics
+ http://google-gson.codegoogle.com/svn/trunk/metrics
+
+
+ Google Code Issue Tracking
+ http://code.google.com/p/google-gson/issues/list
+
+
+ Google, Inc.
+ http://www.google.com
+
+
+
+ com.google.code.gson
+ gson
+ 1.7-SNAPSHOT
+
+
+ junit
+ junit
+ 3.8.2
+ test
+
+
+
+ package
+
+
+ org.apache.maven.plugins
+ maven-compiler-plugin
+ 2.3.2
+
+
+ 1.5
+
+
+
+ org.apache.maven.plugins
+ maven-eclipse-plugin
+ 2.8
+
+ true
+ true
+ ../eclipse-ws/
+
+ file:///${basedir}/../lib/gson-formatting-styles.xml
+
+
+
+
+ org.apache.maven.plugins
+ maven-release-plugin
+ 2.1
+
+ -DenableCiProfile=true
+ https://google-gson.googlecode.com/svn/tags/
+
+
+
+
+
+
+ Inderjeet Singh
+ Google Inc.
+
+
+ Joel Leitch
+ Google Inc.
+
+
+ Jesse Wilson
+ Google Inc.
+
+
+
diff --git a/metrics/src/main/java/com/google/gson/metrics/BagOfPrimitives.java b/metrics/src/main/java/com/google/gson/metrics/BagOfPrimitives.java
new file mode 100644
index 00000000..72cd6b6d
--- /dev/null
+++ b/metrics/src/main/java/com/google/gson/metrics/BagOfPrimitives.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2011 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 com.google.gson.metrics;
+
+/**
+ * Class with a bunch of primitive fields
+ *
+ * @author Inderjeet Singh
+ */
+public class BagOfPrimitives {
+ public static final long DEFAULT_VALUE = 0;
+ public long longValue;
+ public int intValue;
+ public boolean booleanValue;
+ public String stringValue;
+
+ public BagOfPrimitives() {
+ this(DEFAULT_VALUE, 0, false, "");
+ }
+
+ public BagOfPrimitives(long longValue, int intValue, boolean booleanValue, String stringValue) {
+ this.longValue = longValue;
+ this.intValue = intValue;
+ this.booleanValue = booleanValue;
+ this.stringValue = stringValue;
+ }
+
+ public int getIntValue() {
+ return intValue;
+ }
+
+ public String getExpectedJson() {
+ StringBuilder sb = new StringBuilder();
+ sb.append("{");
+ sb.append("\"longValue\":").append(longValue).append(",");
+ sb.append("\"intValue\":").append(intValue).append(",");
+ sb.append("\"booleanValue\":").append(booleanValue).append(",");
+ sb.append("\"stringValue\":\"").append(stringValue).append("\"");
+ sb.append("}");
+ return sb.toString();
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + (booleanValue ? 1231 : 1237);
+ result = prime * result + intValue;
+ result = prime * result + (int) (longValue ^ (longValue >>> 32));
+ result = prime * result + ((stringValue == null) ? 0 : stringValue.hashCode());
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj)
+ return true;
+ if (obj == null)
+ return false;
+ if (getClass() != obj.getClass())
+ return false;
+ BagOfPrimitives other = (BagOfPrimitives) obj;
+ if (booleanValue != other.booleanValue)
+ return false;
+ if (intValue != other.intValue)
+ return false;
+ if (longValue != other.longValue)
+ return false;
+ if (stringValue == null) {
+ if (other.stringValue != null)
+ return false;
+ } else if (!stringValue.equals(other.stringValue))
+ return false;
+ return true;
+ }
+
+ @Override
+ public String toString() {
+ return String.format("(longValue=%d,intValue=%d,booleanValue=%b,stringValue=%s)",
+ longValue, intValue, booleanValue, stringValue);
+ }
+}
diff --git a/metrics/src/main/java/com/google/gson/metrics/GsonBenchmark.java b/metrics/src/main/java/com/google/gson/metrics/GsonBenchmark.java
new file mode 100644
index 00000000..a8600da4
--- /dev/null
+++ b/metrics/src/main/java/com/google/gson/metrics/GsonBenchmark.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2011 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 com.google.gson.metrics;
+
+import java.io.IOException;
+import java.io.StringReader;
+
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+import com.google.caliper.SimpleBenchmark;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.stream.JsonReader;
+
+/**
+ * Caliper based micro benchmarks for Gson
+ *
+ * @author Inderjeet Singh
+ * @author Jesse Wilson
+ * @author Joel Leitch
+ */
+public class GsonBenchmark extends SimpleBenchmark {
+
+ private Gson gson;
+ private BagOfPrimitives bag;
+ private String json;
+ @Param
+ private boolean pretty;
+
+ public static void main(String[] args) {
+ Runner.main(GsonBenchmark.class, args);
+ }
+
+ @Override
+ protected void setUp() throws Exception {
+ this.gson = pretty ? new GsonBuilder().setPrettyPrinting().create() : new Gson();
+ this.bag = new BagOfPrimitives(10L, 1, false, "foo");
+ this.json = gson.toJson(bag);
+ }
+
+ public void timeObjectSerialization(int reps) {
+ for (int i=0; i