1 /* 2 * Copyright (C) 2016 The Android Open Source Project 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 benchmarks.regression; 18 19 import com.google.caliper.Param; 20 21 public class StringReplaceBenchmark { 22 static enum StringLengths { 23 EMPTY(""), 24 L_16(makeString(16)), 25 L_64(makeString(64)), 26 L_256(makeString(256)), 27 L_512(makeString(512)); 28 29 private final String value; 30 31 private StringLengths(String s) { 32 this.value = s; 33 } 34 } 35 36 private static final String makeString(int length) { 37 final String sequence8 = "abcdefghijklmnop"; 38 final int numAppends = (length / 16) - 1; 39 StringBuilder stringBuilder = new StringBuilder(length); 40 41 // (n-1) occurences of "abcdefghijklmnop" 42 for (int i = 0; i < numAppends; ++i) { 43 stringBuilder.append(sequence8); 44 } 45 46 // and one final occurence of qrstuvwx. 47 stringBuilder.append("qrstuvwx"); 48 49 return stringBuilder.toString(); 50 } 51 52 @Param private StringLengths s; 53 54 public void timeReplaceCharNonExistent(int reps) { 55 for (int i = 0; i < reps; ++i) { 56 s.value.replace('z', '0'); 57 } 58 } 59 60 public void timeReplaceCharRepeated(int reps) { 61 for (int i = 0; i < reps; ++i) { 62 s.value.replace('a', '0'); 63 } 64 } 65 66 public void timeReplaceSingleChar(int reps) { 67 for (int i = 0; i < reps; ++i) { 68 s.value.replace('q', '0'); 69 } 70 } 71 72 public void timeReplaceSequenceNonExistent(int reps) { 73 for (int i = 0; i < reps; ++i) { 74 s.value.replace("fish", "0"); 75 } 76 } 77 78 public void timeReplaceSequenceRepeated(int reps) { 79 for (int i = 0; i < reps; ++i) { 80 s.value.replace("jklm", "0"); 81 } 82 } 83 84 public void timeReplaceSingleSequence(int reps) { 85 for (int i = 0; i < reps; ++i) { 86 s.value.replace("qrst", "0"); 87 } 88 } 89 } 90
