1/*
2 * Copyright (C) 2012 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.caliper.Param;
21
22/**
23 * Some microbenchmarks for the {@link Objects.ToStringHelper} class.
24 *
25 * @author Osvaldo Doederlein
26 */
27public class ToStringHelperBenchmark {
28
29  @Param({"0", "2", "5", "10"}) int dataSize;
30  private static final String NAME = "abcdefgh";
31  private static final String NAME3 = Strings.repeat(NAME, 3);
32
33  private static void addEntries(Objects.ToStringHelper helper) {
34    helper
35      .add(NAME, 10)
36      .addValue(10L)
37      .add(NAME, 3.14f)
38      .addValue(3.14d)
39      .add(NAME3, false)
40      .add(NAME3, NAME3)
41      .add(NAME3, 'x');
42  }
43
44  @Benchmark int toString(int reps) {
45    int dummy = 0;
46    for (int i = 0; i < reps; i++) {
47      Objects.ToStringHelper helper = Objects.toStringHelper("klass").omitNullValues();
48      for (int j = 0; j < dataSize; ++j) {
49        addEntries(helper);
50      }
51      dummy ^= helper
52          .toString().hashCode();
53    }
54    return dummy;
55  }
56}
57