MutableIntBenchmark.java revision 5a7833b406bb2716b057d3ed923f22f1f86b2a20 
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
17package benchmarks.regression;
18
19import com.google.caliper.Param;
20import com.google.caliper.Runner;
21import com.google.caliper.SimpleBenchmark;
22import java.util.concurrent.atomic.AtomicInteger;
23
24public final class MutableIntBenchmark extends SimpleBenchmark {
25
26    enum Kind {
27        ARRAY() {
28            int[] value = new int[1];
29
30            @Override void timeCreate(int reps) {
31                for (int i = 0; i < reps; i++) {
32                    value = new int[] { 5 };
33                }
34            }
35            @Override void timeIncrement(int reps) {
36                for (int i = 0; i < reps; i++) {
37                    value[0]++;
38                }
39            }
40            @Override int timeGet(int reps) {
41                int sum = 0;
42                for (int i = 0; i < reps; i++) {
43                    sum += value[0];
44                }
45                return sum;
46            }
47        },
48        ATOMIC() {
49            AtomicInteger value = new AtomicInteger();
50
51            @Override void timeCreate(int reps) {
52                for (int i = 0; i < reps; i++) {
53                    value = new AtomicInteger(5);
54                }
55            }
56            @Override void timeIncrement(int reps) {
57                for (int i = 0; i < reps; i++) {
58                    value.incrementAndGet();
59                }
60            }
61            @Override int timeGet(int reps) {
62                int sum = 0;
63                for (int i = 0; i < reps; i++) {
64                    sum += value.intValue();
65                }
66                return sum;
67            }
68        };
69
70        abstract void timeCreate(int reps);
71        abstract void timeIncrement(int reps);
72        abstract int timeGet(int reps);
73    }
74
75    @Param Kind kind;
76
77    public void timeCreate(int reps) {
78        kind.timeCreate(reps);
79    }
80
81    public void timeIncrement(int reps) {
82        kind.timeIncrement(reps);
83    }
84
85    public void timeGet(int reps) {
86        kind.timeGet(reps);
87    }
88
89    public static void main(String[] args) {
90        Runner.main(MutableIntBenchmark.class, args);
91    }
92}
93