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Android example source code file (HashMapPerfTest.java)
The HashMapPerfTest.java Android example source code/* * Copyright (C) 2008 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. */ package android.core; import android.os.SystemClock; import android.test.suitebuilder.annotation.LargeTest; import junit.framework.TestCase; import java.util.HashMap; import java.util.Random; /** * Tests basic functionality of HashMaps and prints the time needed to System.out */ public class HashMapPerfTest extends TestCase { private static final Random sRandom = new Random(1); class StringThing { String mId; public StringThing() { int len = sRandom.nextInt(20) + 1; char[] chars = new char[len]; chars[0] = 't'; for (int i = 1; i < len; i++) { chars[i] = (char) ('q' + sRandom.nextInt(4)); } mId = new String(chars, 0, len); } public String getId() { return mId; } } private static final int NUM_ELTS = 1000; private static final int ITERS = 100; String[] keyCopies = new String[NUM_ELTS]; private static final boolean lookupByOriginals = false; @LargeTest public void testHashMapPerformance() throws Exception { StringThing[] st = new StringThing[NUM_ELTS]; for (int i = 0; i < NUM_ELTS; i++) { st[i] = new StringThing(); keyCopies[i] = st[i].getId(); } // android.os.Debug.startMethodTracing(); long start = SystemClock.uptimeMillis(); for (int i = 0; i < ITERS; i++) { HashMap<String, StringThing> map = new HashMap Other Android examples (source code examples)Here is a short list of links related to this Android HashMapPerfTest.java source code file: |
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