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 PipelineSeqMultiple {
  45 
  46     @Param("100000")
  47     private int size;
  48 
  49     @Benchmark
  50     public Object bulk_into_anon() {
  51         return LongStream.range(0, size)
  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 Object bulk_into_named() {
  65         LongPredicate t = (x) -> true;
  66         LongPredicate f = (x) -> false;
  67         return LongStream.range(0, size)
  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 Object bulk_foreach_anon() {
  82         LongAdder adder = new LongAdder();
  83         LongStream.range(0, size).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 Object bulk_foreach_named() {
 100         LongAdder adder = new LongAdder();
 101         LongPredicate t = (x) -> true;
 102         LongPredicate f = (x) -> false;
 103         LongStream.range(0, size).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 Object bulk_ifs() {
 119         LongAdder adder = new LongAdder();
 120         LongStream.range(0, size).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 }