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;
  26 
  27 import org.openjdk.jmh.annotations.Benchmark;
  28 import org.openjdk.jmh.annotations.BenchmarkMode;
  29 import org.openjdk.jmh.annotations.Mode;
  30 import org.openjdk.jmh.annotations.OutputTimeUnit;
  31 import org.openjdk.jmh.annotations.Param;
  32 import org.openjdk.jmh.annotations.Scope;
  33 import org.openjdk.jmh.annotations.Setup;
  34 import org.openjdk.jmh.annotations.State;
  35 
  36 import java.util.concurrent.TimeUnit;
  37 import java.util.function.LongPredicate;
  38 import java.util.stream.LongStream;
  39 
  40 /**
  41  * Benchmark for checking different "anyMatch" schemes.
  42  */
  43 @BenchmarkMode(Mode.Throughput)
  44 @OutputTimeUnit(TimeUnit.SECONDS)
  45 @State(Scope.Thread)
  46 public class AnyMatcher {
  47 
  48     /**
  49      * Implementation notes:
  50      *   - operations are explicit inner classes to untangle unwanted lambda effects
  51      *   - all operations have similar semantics
  52      */
  53 
  54     @Param("100000")
  55     private int size;
  56 
  57     private LongPredicate op;
  58 
  59     @Setup
  60     public void setup() {
  61         op = new LongPredicate() {
  62             @Override
  63             public boolean test(long x) {
  64                 return false;
  65             }
  66         };
  67     }
  68 
  69     @Benchmark
  70     public boolean seq_anyMatch() {
  71         return LongStream.range(0, size).anyMatch(op);
  72     }
  73 
  74     @Benchmark
  75     public boolean seq_filter_findFirst() {
  76         return LongStream.range(0, size).filter(op).findFirst().isPresent();
  77     }
  78 
  79     @Benchmark
  80     public boolean seq_filter_findAny() {
  81         return LongStream.range(0, size).filter(op).findAny().isPresent();
  82     }
  83 
  84     @Benchmark
  85     public boolean par_anyMatch() {
  86         return LongStream.range(0, size).parallel().anyMatch(op);
  87     }
  88 
  89     @Benchmark
  90     public boolean par_filter_findFirst() {
  91         return LongStream.range(0, size).parallel().filter(op).findFirst().isPresent();
  92     }
  93 
  94     @Benchmark
  95     public boolean par_filter_findAny() {
  96         return LongStream.range(0, size).parallel().filter(op).findAny().isPresent();
  97     }
  98 
  99 }