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