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
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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 ChainLambdaCap0 extends ChainBase {
43 
44     public Level start1;
45     public Level start2;
46     public Level start4;
47     public Level start8;
48 
49     @Setup
init()50     public void init() {
51         start1 = get1();
52         start2 = get2();
53         start4 = get4();
54         start8 = get8();
55     }
56 
57     @Benchmark
58     @OperationsPerInvocation(1)
call1(Blackhole bh)59     public void call1(Blackhole bh) {
60         process(bh, start1);
61     }
62 
63     @Benchmark
64     @OperationsPerInvocation(2)
call2(Blackhole bh)65     public void call2(Blackhole bh) {
66         process(bh, start2);
67     }
68 
69     @Benchmark
70     @OperationsPerInvocation(4)
call4(Blackhole bh)71     public void call4(Blackhole bh) {
72         process(bh, start4);
73     }
74 
75     @Benchmark
76     @OperationsPerInvocation(8)
call8(Blackhole bh)77     public void call8(Blackhole bh) {
78         process(bh, start8);
79     }
80 
get0()81     public static TopLevel get0() {
82         return () -> "GOT: ";
83     }
84 
get1()85     public static Level get1() {
86         return () -> get0();
87     }
88 
get2()89     public static Level get2() {
90         return () -> get1();
91     }
92 
get3()93     public static Level get3() {
94         return () -> get2();
95     }
96 
get4()97     public static Level get4() {
98         return () -> get3();
99     }
100 
get5()101     public static Level get5() {
102         return () -> get4();
103     }
104 
get6()105     public static Level get6() {
106         return () -> get5();
107     }
108 
get7()109     public static Level get7() {
110         return () -> get6();
111     }
112 
get8()113     public static Level get8() {
114         return () -> get7();
115     }
116 
117 }
118