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.vm.lambda.chain;
  26 import org.openjdk.jmh.annotations.Benchmark;
  27 import org.openjdk.jmh.annotations.BenchmarkMode;
  28 import org.openjdk.jmh.annotations.Mode;
  29 import org.openjdk.jmh.annotations.OperationsPerInvocation;
  30 import org.openjdk.jmh.annotations.OutputTimeUnit;
  31 import org.openjdk.jmh.annotations.Scope;
  32 import org.openjdk.jmh.annotations.Setup;
  33 import org.openjdk.jmh.annotations.State;
  34 import org.openjdk.jmh.infra.Blackhole;
  35 
  36 import java.util.concurrent.TimeUnit;
  37 
  38 /**
  39  * Chain of (capture + invocation) microbenchmark.
  40  */
  41 @State(Scope.Benchmark)
  42 @BenchmarkMode(Mode.AverageTime)
  43 @OutputTimeUnit(TimeUnit.NANOSECONDS)
  44 public class ChainMrefBound extends ChainBase {
  45 
  46     public Level start1;
  47     public Level start2;
  48     public Level start4;
  49     public Level start8;
  50 
  51     @Setup
  52     public void init() {
  53         start1 = get1();
  54         start2 = get2();
  55         start4 = get4();
  56         start8 = get8();
  57     }
  58 
  59     @Benchmark
  60     @OperationsPerInvocation(1)
  61     public void call1(Blackhole bh) {
  62         process(bh, start1);
  63     }
  64 
  65     @Benchmark
  66     @OperationsPerInvocation(2)
  67     public void call2(Blackhole bh) {
  68         process(bh, start2);
  69     }
  70 
  71     @Benchmark
  72     @OperationsPerInvocation(4)
  73     public void call4(Blackhole bh) {
  74         process(bh, start4);
  75     }
  76 
  77     @Benchmark
  78     @OperationsPerInvocation(8)
  79     public void call8(Blackhole bh) {
  80         process(bh, start8);
  81     }
  82 
  83     public TopLevel get0() {
  84         return () -> "GOT: ";
  85     }
  86 
  87     public Level get1() {
  88         return this::get0;
  89     }
  90 
  91     public Level get2() {
  92         return this::get1;
  93     }
  94 
  95     public Level get3() {
  96         return this::get2;
  97     }
  98 
  99     public Level get4() {
 100         return this::get3;
 101     }
 102 
 103     public Level get5() {
 104         return this::get4;
 105     }
 106 
 107     public Level get6() {
 108         return this::get5;
 109     }
 110 
 111     public Level get7() {
 112         return this::get6;
 113     }
 114 
 115     public Level get8() {
 116         return this::get7;
 117     }
 118 
 119 }