1 /* 2 * Copyright (C) 2013 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 com.google.caliper.Param; 20 21 public class SystemArrayCopyBenchmark { 22 @Param({"2", "4", "8", "16", "32", "64", "128", "256", "512", "1024", 23 "2048", "4096", "8192", "16384", "32768", "65536", "131072", "262144"}) 24 int arrayLength; 25 26 // Provides benchmarking for different types of arrays using the arraycopy function. 27 28 public void timeSystemCharArrayCopy(int reps) { 29 final int len = arrayLength; 30 char[] src = new char[len]; 31 char[] dst = new char[len]; 32 for (int rep = 0; rep < reps; ++rep) { 33 System.arraycopy(src, 0, dst, 0, len); 34 } 35 } 36 37 public void timeSystemByteArrayCopy(int reps) { 38 final int len = arrayLength; 39 byte[] src = new byte[len]; 40 byte[] dst = new byte[len]; 41 for (int rep = 0; rep < reps; ++rep) { 42 System.arraycopy(src, 0, dst, 0, len); 43 } 44 } 45 46 public void timeSystemShortArrayCopy(int reps) { 47 final int len = arrayLength; 48 short[] src = new short[len]; 49 short[] dst = new short[len]; 50 for (int rep = 0; rep < reps; ++rep) { 51 System.arraycopy(src, 0, dst, 0, len); 52 } 53 } 54 55 public void timeSystemIntArrayCopy(int reps) { 56 final int len = arrayLength; 57 int[] src = new int[len]; 58 int[] dst = new int[len]; 59 for (int rep = 0; rep < reps; ++rep) { 60 System.arraycopy(src, 0, dst, 0, len); 61 } 62 } 63 64 public void timeSystemLongArrayCopy(int reps) { 65 final int len = arrayLength; 66 long[] src = new long[len]; 67 long[] dst = new long[len]; 68 for (int rep = 0; rep < reps; ++rep) { 69 System.arraycopy(src, 0, dst, 0, len); 70 } 71 } 72 73 public void timeSystemFloatArrayCopy(int reps) { 74 final int len = arrayLength; 75 float[] src = new float[len]; 76 float[] dst = new float[len]; 77 for (int rep = 0; rep < reps; ++rep) { 78 System.arraycopy(src, 0, dst, 0, len); 79 } 80 } 81 82 public void timeSystemDoubleArrayCopy(int reps) { 83 final int len = arrayLength; 84 double[] src = new double[len]; 85 double[] dst = new double[len]; 86 for (int rep = 0; rep < reps; ++rep) { 87 System.arraycopy(src, 0, dst, 0, len); 88 } 89 } 90 91 public void timeSystemBooleanArrayCopy(int reps) { 92 final int len = arrayLength; 93 boolean[] src = new boolean[len]; 94 boolean[] dst = new boolean[len]; 95 for (int rep = 0; rep < reps; ++rep) { 96 System.arraycopy(src, 0, dst, 0, len); 97 } 98 } 99 } 100
