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