1   /*
2    * Copyright (C) 2011 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.collect;
18  
19  import com.google.caliper.Benchmark;
20  
21  /**
22   * Benchmarking interners.
23   * 
24   * @author Dimitris Andreou
25   */
26  public class InternersBenchmark {
27    @Benchmark int weakInterner(int reps) {
28      Interner<String> interner = Interners.newWeakInterner();
29      for (int i = 0; i < reps; i++) {
30        interner.intern(Double.toHexString(Math.random()));
31      }
32      return reps;
33    }
34    
35    @Benchmark int strongInterner(int reps) {
36      Interner<String> interner = Interners.newStrongInterner();
37      for (int i = 0; i < reps; i++) {
38        interner.intern(Double.toHexString(Math.random()));
39      }
40      return reps;
41    }
42    
43    @SuppressWarnings("ReturnValueIgnored")
44    @Benchmark int stringIntern(int reps) {
45      for (int i = 0; i < reps; i++) {
46        Double.toHexString(Math.random()).intern();
47      }
48      return reps;
49    }
50  }