1/*
2 * Copyright (C) 2010 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package benchmarks;
18
19import java.util.ArrayList;
20
21/**
22 * Is a hand-coded counted loop through an ArrayList cheaper than enhanced for?
23 */
24public class ArrayListIterationBenchmark {
25    ArrayList<Foo> mList = new ArrayList<Foo>();
26    {
27        for (int i = 0; i < 27; ++i) mList.add(new Foo());
28    }
29    public void timeArrayListIterationIndexed(int reps) {
30        for (int rep = 0; rep < reps; ++rep) {
31            int sum = 0;
32            ArrayList<Foo> list = mList;
33            int len = list.size();
34            for (int i = 0; i < len; ++i) {
35                sum += list.get(i).mSplat;
36            }
37        }
38    }
39    public void timeArrayListIterationForEach(int reps) {
40        for (int rep = 0; rep < reps; ++rep) {
41            int sum = 0;
42            for (Foo a : mList) {
43                sum += a.mSplat;
44            }
45        }
46    }
47}
48