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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.bench.java.util.stream.pipeline; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.BenchmarkMode; 27 import org.openjdk.jmh.annotations.Mode; 28 import org.openjdk.jmh.annotations.OutputTimeUnit; 29 import org.openjdk.jmh.annotations.Param; 30 import org.openjdk.jmh.annotations.Scope; 31 import org.openjdk.jmh.annotations.State; 32 33 import java.util.concurrent.TimeUnit; 34 import java.util.concurrent.atomic.LongAdder; 35 import java.util.function.LongPredicate; 36 import java.util.stream.LongStream; 37 38 /** 39 * Benchmark tests the pipeline fusion abilities. 40 */ 41 @BenchmarkMode(Mode.Throughput) 42 @OutputTimeUnit(TimeUnit.SECONDS) 43 @State(Scope.Thread) 44 public class PipelineParMultiple { 45 46 @Param("100000") 47 private int size; 48 49 @Benchmark 50 public long bulk_into_anon() { 51 return LongStream.range(0, size).parallel() 52 .filter((x) -> true) 53 .filter((x) -> true) 54 .filter((x) -> true) 55 .filter((x) -> true) 56 .filter((x) -> true) 57 .filter((x) -> true) 58 .filter((x) -> true) 59 .filter((x) -> false) 60 .collect(LongAdder::new, LongAdder::add, (la1, la2) -> la1.add(la2.sum())).sum(); 61 } 62 63 @Benchmark 64 public long bulk_into_named() { 65 LongPredicate t = (x) -> true; 66 LongPredicate f = (x) -> false; 67 return LongStream.range(0, size).parallel() 68 .filter(t) 69 .filter(t) 70 .filter(t) 71 .filter(t) 72 .filter(t) 73 .filter(t) 74 .filter(t) 75 .filter(f) 76 .collect(LongAdder::new, LongAdder::add, (la1, la2) -> la1.add(la2.sum())).sum(); 77 } 78 79 80 @Benchmark 81 public long bulk_foreach_anon() { 82 LongAdder adder = new LongAdder(); 83 LongStream.range(0, size).parallel().forEach((l) -> { 84 if (((LongPredicate) (x) -> true).test(l)) 85 if (((LongPredicate) (x) -> true).test(l)) 86 if (((LongPredicate) (x) -> true).test(l)) 87 if (((LongPredicate) (x) -> true).test(l)) 88 if (((LongPredicate) (x) -> true).test(l)) 89 if (((LongPredicate) (x) -> true).test(l)) 90 if (((LongPredicate) (x) -> true).test(l)) 91 if (((LongPredicate) (x) -> false).test(l)) 92 adder.add(l); 93 }); 94 return adder.sum(); 95 } 96 97 98 @Benchmark 99 public long bulk_foreach_named() { 100 LongAdder adder = new LongAdder(); 101 LongPredicate t = (x) -> true; 102 LongPredicate f = (x) -> false; 103 LongStream.range(0, size).parallel().forEach((l) -> { 104 if (t.test(l)) 105 if (t.test(l)) 106 if (t.test(l)) 107 if (t.test(l)) 108 if (t.test(l)) 109 if (t.test(l)) 110 if (t.test(l)) 111 if (f.test(l)) 112 adder.add(l); 113 }); 114 return adder.sum(); 115 } 116 117 @Benchmark 118 public long bulk_ifs() { 119 LongAdder adder = new LongAdder(); 120 LongStream.range(0, size).parallel().forEach((l) -> { 121 if (true) 122 if (true) 123 if (true) 124 if (true) 125 if (true) 126 if (true) 127 if (true) 128 if (false) 129 adder.add(l); 130 }); 131 return adder.sum(); 132 } 133 134 }