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 import java.util.Arrays; 20 21 public class ArrayCopyBenchmark { 22 public void timeManualArrayCopy(int reps) { 23 char[] src = new char[8192]; 24 for (int rep = 0; rep < reps; ++rep) { 25 char[] dst = new char[8192]; 26 for (int i = 0; i < 8192; ++i) { 27 dst[i] = src[i]; 28 } 29 } 30 } 31 32 public void time_System_arrayCopy(int reps) { 33 char[] src = new char[8192]; 34 for (int rep = 0; rep < reps; ++rep) { 35 char[] dst = new char[8192]; 36 System.arraycopy(src, 0, dst, 0, 8192); 37 } 38 } 39 40 public void time_Arrays_copyOf(int reps) { 41 char[] src = new char[8192]; 42 for (int rep = 0; rep < reps; ++rep) { 43 char[] dst = Arrays.copyOf(src, 8192); 44 } 45 } 46 47 public void time_Arrays_copyOfRange(int reps) { 48 char[] src = new char[8192]; 49 for (int rep = 0; rep < reps; ++rep) { 50 char[] dst = Arrays.copyOfRange(src, 0, 8192); 51 } 52 } 53 } 54
