1 /* 2 * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package org.openjdk.bench.java.util.stream.ops.ref; 26 27 import org.openjdk.bench.java.util.stream.ops.LongAccumulator; 28 import org.openjdk.jmh.annotations.Benchmark; 29 import org.openjdk.jmh.annotations.BenchmarkMode; 30 import org.openjdk.jmh.annotations.Mode; 31 import org.openjdk.jmh.annotations.OutputTimeUnit; 32 import org.openjdk.jmh.annotations.Param; 33 import org.openjdk.jmh.annotations.Scope; 34 import org.openjdk.jmh.annotations.Setup; 35 import org.openjdk.jmh.annotations.State; 36 37 import java.util.concurrent.TimeUnit; 38 import java.util.function.Predicate; 39 import java.util.stream.LongStream; 40 41 /** 42 * Benchmark for filter() operation. 43 */ 44 @BenchmarkMode(Mode.Throughput) 45 @OutputTimeUnit(TimeUnit.SECONDS) 46 @State(Scope.Thread) 47 public class Filter { 48 49 /** 50 * Implementation notes: 51 * - parallel version requires thread-safe sink, we use the same for sequential version for better comparison 52 * - operations are explicit inner classes to untangle unwanted lambda effects 53 * - the result of applying consecutive predicates is the same, in order to have the same number of elements in sink 54 */ 55 56 @Param("100000") 57 private int size; 58 59 private Predicate<Long> p1, p2, p3; 60 61 @Setup 62 public void setup() { 63 p1 = new Predicate<Long>() { 64 @Override 65 public boolean test(Long l) { 66 return (l & 0b11111111) == 0; 67 } 68 }; 69 p2 = new Predicate<Long>() { 70 @Override 71 public boolean test(Long l) { 72 return (l & 0b00001111) == 0; 73 } 74 }; 75 p3 = new Predicate<Long>() { 76 @Override 77 public boolean test(Long l) { 78 return (l & 0x00000011) == 0; 79 } 80 }; 81 } 82 83 @Benchmark 84 public long seq_invoke() { 85 return LongStream.range(0, size) 86 .boxed() 87 .filter(p1) 88 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 89 } 90 91 @Benchmark 92 public long par_invoke() { 93 return LongStream.range(0, size).parallel() 94 .boxed() 95 .filter(p1) 96 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 97 } 98 99 @Benchmark 100 public long seq_chain_111() { 101 return LongStream.range(0, size) 102 .boxed() 103 .filter(p1) 104 .filter(p1) 105 .filter(p1) 106 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 107 } 108 109 @Benchmark 110 public long par_chain_111() { 111 return LongStream.range(0, size).parallel() 112 .boxed() 113 .filter(p1) 114 .filter(p1) 115 .filter(p1) 116 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 117 } 118 119 @Benchmark 120 public long seq_chain_123() { 121 return LongStream.range(0, size) 122 .boxed() 123 .filter(p1) 124 .filter(p2) 125 .filter(p3) 126 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 127 } 128 129 @Benchmark 130 public long par_chain_123() { 131 return LongStream.range(0, size).parallel() 132 .boxed() 133 .filter(p1) 134 .filter(p2) 135 .filter(p3) 136 .collect(LongAccumulator::new, LongAccumulator::add, LongAccumulator::merge).get(); 137 } 138 139 }