1 files changed, 85 insertions, 0 deletions
diff --git a/test/028-array-write/src/Main.java b/test/028-array-write/src/Main.java
new file mode 100644
index 0000000000..2618ff8aa4
--- /dev/null
+++ b/test/028-array-write/src/Main.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+/**
+ * Array write speed test.
+ */
+public class Main {
+    /** whether to report times */
+    static boolean timing = false;
+
+    static final int STORAGE_SIZE = 128*1024;
+    static int[] mStorage = new int[STORAGE_SIZE];
+
+    static public void report(long start, long end) {
+        if (! timing) {
+            return;
+        }
+
+        System.out.println("Finished in " + ((end - start) / 1000000.0)
+            + " msec");
+    }
+
+    static void writeArray(int val) {
+        for (int i = STORAGE_SIZE-1; i >= 0; i--)
+            mStorage[i] = val;
+    }
+
+    static void writeTest() {
+        long start, end;
+
+        writeArray(0);  // touch all the memory
+
+        System.out.println("Running writeTest...");
+        start = System.nanoTime();
+        for (int i = 1; i < 20; i++)
+            writeArray(i);
+        end = System.nanoTime();
+
+        report(start, end);
+    }
+
+    static void copyTest() {
+        long start, end;
+
+        // touch once
+        System.arraycopy(mStorage, 0, mStorage,
+            STORAGE_SIZE/2, STORAGE_SIZE/2);
+
+        System.out.println("Running copyTest...");
+        start = System.nanoTime();
+        for (int i = 1; i < 35; i++) {
+            System.arraycopy(mStorage, 0, mStorage,
+                STORAGE_SIZE/2, STORAGE_SIZE/2);
+        }
+        end = System.nanoTime();
+
+        report(start, end);
+    }
+
+    public static void array_028() {
+        writeTest();
+        copyTest();
+        System.out.println("Done!");
+    }
+
+    public static void main(String[] args) {
+        if ((args.length >= 1) && args[0].equals("--timing")) {
+            timing = true;
+        }
+        array_028();
+    }
+}