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.ops.value;
  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.Setup;
  32 import org.openjdk.jmh.annotations.State;
  33 
  34 import java.util.concurrent.TimeUnit;
  35 import java.util.function.LongPredicate;
  36 import java.util.stream.LongStream;
  37 
  38 /**
  39  * Benchmark for anyMatch() operation.
  40  */
  41 @BenchmarkMode(Mode.Throughput)
  42 @OutputTimeUnit(TimeUnit.SECONDS)
  43 @State(Scope.Thread)
  44 public class AnyMatch {
  45 
  46     /**
  47      * Implementation notes:
  48      *   - operations are explicit inner classes to untangle unwanted lambda effects
  49      *   - the predicates are always false to avert shortcurcuiting
  50      */
  51     @Param("100000")
  52     private int size;
  53 
  54     private LongPredicate p1, p2, p3;
  55 
  56     @Setup
  57     public void setup() {
  58         p1 = new LongPredicate() {
  59             @Override
  60             public boolean test(long v) {
  61                 return false;
  62             }
  63         };
  64         p2 = new LongPredicate() {
  65             @Override
  66             public boolean test(long v) {
  67                 return false;
  68             }
  69         };
  70         p3 = new LongPredicate() {
  71             @Override
  72             public boolean test(long v) {
  73                 return false;
  74             }
  75         };
  76     }
  77 
  78     @Benchmark
  79     public boolean seq_invoke() {
  80         return LongStream.range(0, size).anyMatch(p1);
  81     }
  82 
  83     @Benchmark
  84     public int seq_chain111() {
  85         int s = 0;
  86         s += (LongStream.range(0, size).anyMatch(p1)) ? 1 : 0;
  87         s += (LongStream.range(0, size).anyMatch(p1)) ? 1 : 0;
  88         s += (LongStream.range(0, size).anyMatch(p1)) ? 1 : 0;
  89         return s;
  90     }
  91 
  92     @Benchmark
  93     public int seq_chain123() {
  94         int s = 0;
  95         s += (LongStream.range(0, size).anyMatch(p1)) ? 1 : 0;
  96         s += (LongStream.range(0, size).anyMatch(p2)) ? 1 : 0;
  97         s += (LongStream.range(0, size).anyMatch(p3)) ? 1 : 0;
  98         return s;
  99     }
 100 
 101     @Benchmark
 102     public boolean par_invoke() {
 103         return LongStream.range(0, size).parallel().anyMatch(p1);
 104     }
 105 
 106     @Benchmark
 107     public int par_chain111() {
 108         int s = 0;
 109         s += (LongStream.range(0, size).parallel().anyMatch(p1)) ? 1 : 0;
 110         s += (LongStream.range(0, size).parallel().anyMatch(p1)) ? 1 : 0;
 111         s += (LongStream.range(0, size).parallel().anyMatch(p1)) ? 1 : 0;
 112         return s;
 113     }
 114 
 115     @Benchmark
 116     public int par_chain123() {
 117         int s = 0;
 118         s += (LongStream.range(0, size).parallel().anyMatch(p1)) ? 1 : 0;
 119         s += (LongStream.range(0, size).parallel().anyMatch(p2)) ? 1 : 0;
 120         s += (LongStream.range(0, size).parallel().anyMatch(p3)) ? 1 : 0;
 121         return s;
 122     }
 123 
 124 }