1 /* 2 * Copyright (C) 2010 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package benchmarks; 18 19 /** 20 * Compares various kinds of method invocation. 21 */ 22 public class MethodInvocationBenchmark { 23 interface I { 24 void emptyInterface(); 25 } 26 27 static class C implements I { 28 private int field; 29 30 private int getField() { 31 return field; 32 } 33 34 public int timeInternalGetter(int reps) { 35 int result = 0; 36 for (int i = 0; i < reps; ++i) { 37 result = getField(); 38 } 39 return result; 40 } 41 42 public int timeInternalFieldAccess(int reps) { 43 int result = 0; 44 for (int i = 0; i < reps; ++i) { 45 result = field; 46 } 47 return result; 48 } 49 50 public static void emptyStatic() { 51 } 52 53 public void emptyVirtual() { 54 } 55 56 public void emptyInterface() { 57 } 58 } 59 60 public void timeInternalGetter(int reps) { 61 new C().timeInternalGetter(reps); 62 } 63 64 public void timeInternalFieldAccess(int reps) { 65 new C().timeInternalFieldAccess(reps); 66 } 67 68 // Test an intrinsic. 69 public int timeStringLength(int reps) { 70 int result = 0; 71 for (int i = 0; i < reps; ++i) { 72 result = "hello, world!".length(); 73 } 74 return result; 75 } 76 77 public void timeEmptyStatic(int reps) { 78 C c = new C(); 79 for (int i = 0; i < reps; ++i) { 80 c.emptyStatic(); 81 } 82 } 83 84 public void timeEmptyVirtual(int reps) { 85 C c = new C(); 86 for (int i = 0; i < reps; ++i) { 87 c.emptyVirtual(); 88 } 89 } 90 91 public void timeEmptyInterface(int reps) { 92 I c = new C(); 93 for (int i = 0; i < reps; ++i) { 94 c.emptyInterface(); 95 } 96 } 97 98 public static class Inner { 99 private int i; 100 private void privateMethod() { ++i; } 101 protected void protectedMethod() { ++i; } 102 public void publicMethod() { ++i; } 103 void packageMethod() { ++i; } 104 final void finalPackageMethod() { ++i; } 105 } 106 107 public void timePrivateInnerPublicMethod(int reps) { 108 Inner inner = new Inner(); 109 for (int i = 0; i < reps; ++i) { 110 inner.publicMethod(); 111 } 112 } 113 114 public void timePrivateInnerProtectedMethod(int reps) { 115 Inner inner = new Inner(); 116 for (int i = 0; i < reps; ++i) { 117 inner.protectedMethod(); 118 } 119 } 120 121 public void timePrivateInnerPrivateMethod(int reps) { 122 Inner inner = new Inner(); 123 for (int i = 0; i < reps; ++i) { 124 inner.privateMethod(); 125 } 126 } 127 128 public void timePrivateInnerPackageMethod(int reps) { 129 Inner inner = new Inner(); 130 for (int i = 0; i < reps; ++i) { 131 inner.packageMethod(); 132 } 133 } 134 135 public void timePrivateInnerFinalPackageMethod(int reps) { 136 Inner inner = new Inner(); 137 for (int i = 0; i < reps; ++i) { 138 inner.finalPackageMethod(); 139 } 140 } 141 } 142
