/*
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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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* What does field access cost?
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*/
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public class FieldAccessBenchmark {
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private static class Inner {
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public int publicInnerIntVal;
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protected int protectedInnerIntVal;
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private int privateInnerIntVal;
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int packageInnerIntVal;
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}
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int intVal = 42;
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final int finalIntVal = 42;
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static int staticIntVal = 42;
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static final int staticFinalIntVal = 42;
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public int timeField(int reps) {
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int result = 0;
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for (int rep = 0; rep < reps; ++rep) {
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result = intVal;
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}
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return result;
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}
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public int timeFieldFinal(int reps) {
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int result = 0;
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for (int rep = 0; rep < reps; ++rep) {
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result = finalIntVal;
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}
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return result;
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}
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public int timeFieldStatic(int reps) {
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int result = 0;
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for (int rep = 0; rep < reps; ++rep) {
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result = staticIntVal;
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}
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return result;
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}
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public int timeFieldStaticFinal(int reps) {
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int result = 0;
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for (int rep = 0; rep < reps; ++rep) {
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result = staticFinalIntVal;
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}
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return result;
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}
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public int timeFieldCached(int reps) {
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int result = 0;
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int cachedIntVal = this.intVal;
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for (int rep = 0; rep < reps; ++rep) {
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result = cachedIntVal;
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}
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return result;
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}
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public int timeFieldPrivateInnerClassPublicField(int reps) {
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int result = 0;
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Inner inner = new Inner();
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for (int rep = 0; rep < reps; ++rep) {
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result = inner.publicInnerIntVal;
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}
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return result;
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}
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public int timeFieldPrivateInnerClassProtectedField(int reps) {
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int result = 0;
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Inner inner = new Inner();
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for (int rep = 0; rep < reps; ++rep) {
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result = inner.protectedInnerIntVal;
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}
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return result;
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}
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public int timeFieldPrivateInnerClassPrivateField(int reps) {
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int result = 0;
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Inner inner = new Inner();
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for (int rep = 0; rep < reps; ++rep) {
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result = inner.privateInnerIntVal;
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}
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return result;
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}
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public int timeFieldPrivateInnerClassPackageField(int reps) {
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int result = 0;
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Inner inner = new Inner();
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for (int rep = 0; rep < reps; ++rep) {
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result = inner.packageInnerIntVal;
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}
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return result;
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}
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}
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