/*
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* Copyright (C) 2010 Google Inc.
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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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package benchmarks;
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/**
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* How do various ways of iterating through an array compare?
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*/
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public class ArrayIterationBenchmark {
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Foo[] mArray = new Foo[27];
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{
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for (int i = 0; i < mArray.length; ++i) mArray[i] = new Foo();
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}
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public void timeArrayIteration(int reps) {
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for (int rep = 0; rep < reps; ++rep) {
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int sum = 0;
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for (int i = 0; i < mArray.length; i++) {
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sum += mArray[i].mSplat;
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}
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}
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}
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public void timeArrayIterationCached(int reps) {
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for (int rep = 0; rep < reps; ++rep) {
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int sum = 0;
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Foo[] localArray = mArray;
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int len = localArray.length;
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for (int i = 0; i < len; i++) {
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sum += localArray[i].mSplat;
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}
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}
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}
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public void timeArrayIterationForEach(int reps) {
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for (int rep = 0; rep < reps; ++rep) {
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int sum = 0;
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for (Foo a: mArray) {
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sum += a.mSplat;
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}
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}
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}
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}
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