/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Array write speed test.
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*/
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public class Main {
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/** whether to report times */
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static boolean timing = false;
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static final int STORAGE_SIZE = 128*1024;
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static int[] mStorage = new int[STORAGE_SIZE];
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static public void report(long start, long end) {
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if (! timing) {
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return;
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}
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System.out.println("Finished in " + ((end - start) / 1000000.0)
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+ " msec");
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}
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static void writeArray(int val) {
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for (int i = STORAGE_SIZE-1; i >= 0; i--)
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mStorage[i] = val;
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}
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static void writeTest() {
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long start, end;
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writeArray(0); // touch all the memory
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System.out.println("Running writeTest...");
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start = System.nanoTime();
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for (int i = 1; i < 20; i++)
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writeArray(i);
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end = System.nanoTime();
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report(start, end);
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}
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static void copyTest() {
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long start, end;
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// touch once
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System.arraycopy(mStorage, 0, mStorage,
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STORAGE_SIZE/2, STORAGE_SIZE/2);
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System.out.println("Running copyTest...");
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start = System.nanoTime();
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for (int i = 1; i < 35; i++) {
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System.arraycopy(mStorage, 0, mStorage,
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STORAGE_SIZE/2, STORAGE_SIZE/2);
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}
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end = System.nanoTime();
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report(start, end);
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}
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public static void array_028() {
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writeTest();
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copyTest();
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System.out.println("Done!");
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}
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public static void main(String[] args) {
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if ((args.length >= 1) && args[0].equals("--timing")) {
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timing = true;
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}
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array_028();
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}
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}
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