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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;
/**
* Compares various kinds of method invocation.
*/
public class MethodInvocationBenchmark extends SimpleBenchmark {
interface I {
void emptyInterface();
}
static class C implements I {
private int field;
private int getField() {
return field;
}
public int timeInternalGetter(int reps) {
int result = 0;
for (int i = 0; i < reps; ++i) {
result = getField();
}
return result;
}
public int timeInternalFieldAccess(int reps) {
int result = 0;
for (int i = 0; i < reps; ++i) {
result = field;
}
return result;
}
public static void emptyStatic() {
}
public void emptyVirtual() {
}
public void emptyInterface() {
}
}
public void timeInternalGetter(int reps) {
new C().timeInternalGetter(reps);
}
public void timeInternalFieldAccess(int reps) {
new C().timeInternalFieldAccess(reps);
}
// Test an intrinsic.
public int timeStringLength(int reps) {
int result = 0;
for (int i = 0; i < reps; ++i) {
result = "hello, world!".length();
}
return result;
}
public void timeEmptyStatic(int reps) {
C c = new C();
for (int i = 0; i < reps; ++i) {
c.emptyStatic();
}
}
public void timeEmptyVirtual(int reps) {
C c = new C();
for (int i = 0; i < reps; ++i) {
c.emptyVirtual();
}
}
public void timeEmptyInterface(int reps) {
I c = new C();
for (int i = 0; i < reps; ++i) {
c.emptyInterface();
}
}
public static class Inner {
private int i;
private void privateMethod() { ++i; }
protected void protectedMethod() { ++i; }
public void publicMethod() { ++i; }
void packageMethod() { ++i; }
final void finalPackageMethod() { ++i; }
}
public void timePrivateInnerPublicMethod(int reps) {
Inner inner = new Inner();
for (int i = 0; i < reps; ++i) {
inner.publicMethod();
}
}
public void timePrivateInnerProtectedMethod(int reps) {
Inner inner = new Inner();
for (int i = 0; i < reps; ++i) {
inner.protectedMethod();
}
}
public void timePrivateInnerPrivateMethod(int reps) {
Inner inner = new Inner();
for (int i = 0; i < reps; ++i) {
inner.privateMethod();
}
}
public void timePrivateInnerPackageMethod(int reps) {
Inner inner = new Inner();
for (int i = 0; i < reps; ++i) {
inner.packageMethod();
}
}
public void timePrivateInnerFinalPackageMethod(int reps) {
Inner inner = new Inner();
for (int i = 0; i < reps; ++i) {
inner.finalPackageMethod();
}
}
}
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