1 /* 2 * Copyright (C) 2010 The Guava Authors 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 com.google.common.base; 18 19 import com.google.caliper.Benchmark; 20 import com.google.common.base.Objects; 21 22 /** 23 * Some microbenchmarks for the {@link Objects} class. 24 * 25 * @author Ben L. Titzer 26 */ 27 public class ObjectsBenchmark { 28 29 private static final Integer I0 = -45; 30 private static final Integer I1 = -1; 31 private static final Integer I2 = 3; 32 private static final String S0 = "3"; 33 private static final String S1 = "Ninety five"; 34 private static final String S2 = "44 one million"; 35 private static final String S3 = "Lowly laundry lefties"; 36 private static final String S4 = "89273487U#*&#"; 37 private static final Double D0 = 9.234d; 38 private static final Double D1 = -1.2e55; 39 hashString_2(int reps)40 @Benchmark int hashString_2(int reps) { 41 int dummy = 0; 42 for (int i = 0; i < reps; i++) { 43 dummy += Objects.hashCode(S0, S1); 44 } 45 return dummy; 46 } 47 hashString_3(int reps)48 @Benchmark int hashString_3(int reps) { 49 int dummy = 0; 50 for (int i = 0; i < reps; i++) { 51 dummy += Objects.hashCode(S0, S1, S2); 52 } 53 return dummy; 54 } 55 hashString_4(int reps)56 @Benchmark int hashString_4(int reps) { 57 int dummy = 0; 58 for (int i = 0; i < reps; i++) { 59 dummy += Objects.hashCode(S0, S1, S2, S3); 60 } 61 return dummy; 62 } 63 hashString_5(int reps)64 @Benchmark int hashString_5(int reps) { 65 int dummy = 0; 66 for (int i = 0; i < reps; i++) { 67 dummy += Objects.hashCode(S0, S1, S2, S3, S4); 68 } 69 return dummy; 70 } 71 hashMixed_5(int reps)72 @Benchmark int hashMixed_5(int reps) { 73 int dummy = 0; 74 for (int i = 0; i < reps; i++) { 75 dummy += Objects.hashCode(I2, S1, D1, S2, I0); 76 dummy += Objects.hashCode(D0, I1, S3, I2, S0); 77 } 78 return dummy; 79 } 80 } 81