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 }