Add SDK 29 sources.

Test: N/A
Change-Id: Iedb7a31029e003928eb16f7e69ed147e72bb6235
diff --git a/benchmarks/StringIterationBenchmark.java b/benchmarks/StringIterationBenchmark.java
new file mode 100644
index 0000000..1ee9e8c
--- /dev/null
+++ b/benchmarks/StringIterationBenchmark.java
@@ -0,0 +1,57 @@
+/*
+ * 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;
+
+/**
+ * How do the various schemes for iterating through a string compare?
+ */
+public class StringIterationBenchmark {
+    public void timeStringIteration0(int reps) {
+        String s = "hello, world!";
+        for (int rep = 0; rep < reps; ++rep) {
+            char ch;
+            for (int i = 0; i < s.length(); ++i) {
+                ch = s.charAt(i);
+            }
+        }
+    }
+    public void timeStringIteration1(int reps) {
+        String s = "hello, world!";
+        for (int rep = 0; rep < reps; ++rep) {
+            char ch;
+            for (int i = 0, length = s.length(); i < length; ++i) {
+                ch = s.charAt(i);
+            }
+        }
+    }
+    public void timeStringIteration2(int reps) {
+        String s = "hello, world!";
+        for (int rep = 0; rep < reps; ++rep) {
+            char ch;
+            char[] chars = s.toCharArray();
+            for (int i = 0, length = chars.length; i < length; ++i) {
+                ch = chars[i];
+            }
+        }
+    }
+    public void timeStringToCharArray(int reps) {
+        String s = "hello, world!";
+        for (int rep = 0; rep < reps; ++rep) {
+            char[] chars = s.toCharArray();
+        }
+    }
+}