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
17package com.google.common.base;
18
19import com.google.caliper.Benchmark;
20import com.google.common.base.Objects;
21
22/**
23 * Some microbenchmarks for the {@link Objects} class.
24 *
25 * @author Ben L. Titzer
26 */
27public 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
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
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
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
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
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