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