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 }