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.base;
18 
19 import com.google.caliper.BeforeExperiment;
20 import com.google.caliper.Benchmark;
21 import com.google.caliper.Param;
22 import com.google.common.collect.Iterables;
23 
24 /**
25  * Microbenchmark for {@link Splitter#on} with char vs String with length == 1.
26  *
27  * @author Paul Lindner
28  */
29 public class SplitterBenchmark {
30   // overall size of string
31   @Param({"1", "10", "100", "1000"}) int length;
32   // Number of matching strings
33   @Param({"xxxx", "xxXx", "xXxX", "XXXX"}) String text;
34 
35   private String input;
36 
37   private static final Splitter CHAR_SPLITTER = Splitter.on('X');
38   private static final Splitter STRING_SPLITTER = Splitter.on("X");
39 
setUp()40   @BeforeExperiment void setUp() {
41     input = Strings.repeat(text, length);
42   }
43 
charSplitter(int reps)44   @Benchmark void charSplitter(int reps) {
45     int total = 0;
46 
47     for (int i = 0; i < reps; i++) {
48       total += Iterables.size(CHAR_SPLITTER.split(input));
49     }
50   }
51 
stringSplitter(int reps)52   @Benchmark void stringSplitter(int reps) {
53     int total = 0;
54 
55     for (int i = 0; i < reps; i++) {
56      total += Iterables.size(STRING_SPLITTER.split(input));
57     }
58   }
59 }
60