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; 18 19 /** 20 * How do the various schemes for iterating through a string compare? 21 */ 22 public class StringIterationBenchmark { 23 public void timeStringIteration0(int reps) { 24 String s = "hello, world!"; 25 for (int rep = 0; rep < reps; ++rep) { 26 char ch; 27 for (int i = 0; i < s.length(); ++i) { 28 ch = s.charAt(i); 29 } 30 } 31 } 32 public void timeStringIteration1(int reps) { 33 String s = "hello, world!"; 34 for (int rep = 0; rep < reps; ++rep) { 35 char ch; 36 for (int i = 0, length = s.length(); i < length; ++i) { 37 ch = s.charAt(i); 38 } 39 } 40 } 41 public void timeStringIteration2(int reps) { 42 String s = "hello, world!"; 43 for (int rep = 0; rep < reps; ++rep) { 44 char ch; 45 char[] chars = s.toCharArray(); 46 for (int i = 0, length = chars.length; i < length; ++i) { 47 ch = chars[i]; 48 } 49 } 50 } 51 public void timeStringToCharArray(int reps) { 52 String s = "hello, world!"; 53 for (int rep = 0; rep < reps; ++rep) { 54 char[] chars = s.toCharArray(); 55 } 56 } 57 } 58
