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/*
* Copyright (C) 2010 Google Inc.
*
* 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 benchmarks;
import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
/**
* What does field access cost?
*/
public class FieldAccessBenchmark extends SimpleBenchmark {
private static class Inner {
public int publicInnerIntVal;
protected int protectedInnerIntVal;
private int privateInnerIntVal;
int packageInnerIntVal;
}
int intVal = 42;
final int finalIntVal = 42;
static int staticIntVal = 42;
static final int staticFinalIntVal = 42;
public int timeField(int reps) {
int result = 0;
for (int rep = 0; rep < reps; ++rep) {
result = intVal;
}
return result;
}
public int timeFieldFinal(int reps) {
int result = 0;
for (int rep = 0; rep < reps; ++rep) {
result = finalIntVal;
}
return result;
}
public int timeFieldStatic(int reps) {
int result = 0;
for (int rep = 0; rep < reps; ++rep) {
result = staticIntVal;
}
return result;
}
public int timeFieldStaticFinal(int reps) {
int result = 0;
for (int rep = 0; rep < reps; ++rep) {
result = staticFinalIntVal;
}
return result;
}
public int timeFieldCached(int reps) {
int result = 0;
int cachedIntVal = this.intVal;
for (int rep = 0; rep < reps; ++rep) {
result = cachedIntVal;
}
return result;
}
public int timeFieldPrivateInnerClassPublicField(int reps) {
int result = 0;
Inner inner = new Inner();
for (int rep = 0; rep < reps; ++rep) {
result = inner.publicInnerIntVal;
}
return result;
}
public int timeFieldPrivateInnerClassProtectedField(int reps) {
int result = 0;
Inner inner = new Inner();
for (int rep = 0; rep < reps; ++rep) {
result = inner.protectedInnerIntVal;
}
return result;
}
public int timeFieldPrivateInnerClassPrivateField(int reps) {
int result = 0;
Inner inner = new Inner();
for (int rep = 0; rep < reps; ++rep) {
result = inner.privateInnerIntVal;
}
return result;
}
public int timeFieldPrivateInnerClassPackageField(int reps) {
int result = 0;
Inner inner = new Inner();
for (int rep = 0; rep < reps; ++rep) {
result = inner.packageInnerIntVal;
}
return result;
}
}
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