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.ops.value;
  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 anyMatch() operation.
  42  * Focuses on short-circuiting behavior.
  43  */
  44 @BenchmarkMode(Mode.Throughput)
  45 @OutputTimeUnit(TimeUnit.SECONDS)
  46 @State(Scope.Thread)
  47 public class AnyMatchShort {
  48 
  49     /**
  50      * Implementation notes:
  51      *   - operations are explicit inner classes to untangle unwanted lambda effects
  52      *   - test the predicate which will become true closer to start, in the middle, and closer to the end
  53      */
  54 
  55     @Param("100000")
  56     private int size;
  57 
  58     @Param("100")
  59     private int offset;
  60 
  61     private LongPredicate pMid, pStart, pEnd;
  62 
  63     @Setup
  64     public void setup() {
  65         pStart = new LongPredicate() {
  66             @Override
  67             public boolean test(long v) {
  68                 return v > offset;
  69             }
  70         };
  71         pMid = new LongPredicate() {
  72             @Override
  73             public boolean test(long v) {
  74                 return v > size / 2;
  75             }
  76         };
  77         pEnd = new LongPredicate() {
  78             @Override
  79             public boolean test(long v) {
  80                 return v > size - offset;
  81             }
  82         };
  83     }
  84 
  85     @Benchmark
  86     public boolean seq_start() {
  87         return LongStream.range(0, size).anyMatch(pStart);
  88     }
  89 
  90     @Benchmark
  91     public boolean seq_mid() {
  92         return LongStream.range(0, size).anyMatch(pMid);
  93     }
  94 
  95     @Benchmark
  96     public boolean seq_end() {
  97         return LongStream.range(0, size).anyMatch(pEnd);
  98     }
  99 
 100     @Benchmark
 101     public boolean par_start() {
 102         return LongStream.range(0, size).parallel().anyMatch(pStart);
 103     }
 104 
 105     @Benchmark
 106     public boolean par_mid() {
 107         return LongStream.range(0, size).parallel().anyMatch(pMid);
 108     }
 109 
 110     @Benchmark
 111     public boolean par_end() {
 112         return LongStream.range(0, size).parallel().anyMatch(pEnd);
 113     }
 114 
 115 }