1 /* 2 * Copyright (C) 2010 Google Inc. 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 CharsetBenchmark { 22 @Param({ "1", "10", "100", "1000", "10000" }) 23 private int length; 24 25 // canonical => canonical charset name 26 // built-in => guaranteed-present charset 27 // special-case => libcore treats this charset specially for performance 28 @Param({ 29 "UTF-16", // canonical, built-in, non-special-case 30 "UTF-8", // canonical, built-in, special-case 31 "UTF8", // non-canonical, built-in, special-case 32 "ISO-8859-1", // canonical, built-in, special-case 33 "8859_1", // non-canonical, built-in, special-case 34 "ISO-8859-2", // canonical, non-built-in, non-special-case 35 "8859_2", // non-canonical, non-built-in, non-special-case 36 "US-ASCII", // canonical, built-in, special-case 37 "ASCII" // non-canonical, built-in, special-case 38 }) 39 private String name; 40 time_new_String_BString(int reps)41 public void time_new_String_BString(int reps) throws Exception { 42 byte[] bytes = makeBytes(makeString(length)); 43 for (int i = 0; i < reps; ++i) { 44 new String(bytes, name); 45 } 46 } 47 time_new_String_BII(int reps)48 public void time_new_String_BII(int reps) throws Exception { 49 byte[] bytes = makeBytes(makeString(length)); 50 for (int i = 0; i < reps; ++i) { 51 new String(bytes, 0, bytes.length); 52 } 53 } 54 time_new_String_BIIString(int reps)55 public void time_new_String_BIIString(int reps) throws Exception { 56 byte[] bytes = makeBytes(makeString(length)); 57 for (int i = 0; i < reps; ++i) { 58 new String(bytes, 0, bytes.length, name); 59 } 60 } 61 time_String_getBytes(int reps)62 public void time_String_getBytes(int reps) throws Exception { 63 String string = makeString(length); 64 for (int i = 0; i < reps; ++i) { 65 string.getBytes(name); 66 } 67 } 68 makeString(int length)69 private static String makeString(int length) { 70 StringBuilder result = new StringBuilder(length); 71 for (int i = 0; i < length; ++i) { 72 result.append('A' + (i % 26)); 73 } 74 return result.toString(); 75 } 76 makeBytes(String s)77 private static byte[] makeBytes(String s) { 78 try { 79 return s.getBytes("US-ASCII"); 80 } catch (Exception ex) { 81 throw new RuntimeException(ex); 82 } 83 } 84 } 85