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"}) 32 int length; 33 // Number of matching strings 34 @Param({"xxxx", "xxXx", "xXxX", "XXXX"}) 35 String text; 36 37 private String input; 38 39 private static final Splitter CHAR_SPLITTER = Splitter.on('X'); 40 private static final Splitter STRING_SPLITTER = Splitter.on("X"); 41 42 @BeforeExperiment setUp()43 void setUp() { 44 input = Strings.repeat(text, length); 45 } 46 47 @Benchmark charSplitter(int reps)48 void charSplitter(int reps) { 49 int total = 0; 50 51 for (int i = 0; i < reps; i++) { 52 total += Iterables.size(CHAR_SPLITTER.split(input)); 53 } 54 } 55 56 @Benchmark stringSplitter(int reps)57 void stringSplitter(int reps) { 58 int total = 0; 59 60 for (int i = 0; i < reps; i++) { 61 total += Iterables.size(STRING_SPLITTER.split(input)); 62 } 63 } 64 } 65