/*
* 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();
}
}