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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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  *
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23 package org.openjdk.bench.vm.lambda.invoke;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.BenchmarkMode;
27 import org.openjdk.jmh.annotations.Level;
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 import java.util.function.IntUnaryOperator;
38 
39 /**
40  * evaluates N-morphic invocation costs.
41  * the same lambda capture different variables
42  * @author Sergey Kuksenko (sergey.kuksenko@oracle.com)
43  */
44 @BenchmarkMode(Mode.AverageTime)
45 @OutputTimeUnit(TimeUnit.NANOSECONDS)
46 @State(Scope.Thread)
47 public class Morph2 {
48 
49 
50     private static final int LIMIT = 16536;
51     private static final int OPS = 4;
52     private static final int OPERATIONS = OPS*LIMIT;
53 
54     // <source of functional interface>_N; where N - how many different targets
55     private IntUnaryOperator[] inner_1;
56     private IntUnaryOperator[] inner_2;
57     private IntUnaryOperator[] inner_4;
58 
59     private IntUnaryOperator[] lambda_1;
60     private IntUnaryOperator[] lambda_2;
61     private IntUnaryOperator[] lambda_4;
62 
63     @Setup(Level.Trial)
setup()64     public void setup() {
65         setup_inner(1,2,3,4);
66         setup_lambda(1,2,3,4);
67     }
68 
setup_inner(int a, int b, int c, int d)69     private void setup_inner(int a, int b, int c, int d) {
70         inner_4 =  new IntUnaryOperator[] {
71                 makeInner(a),
72                 makeInner(b),
73                 makeInner(c),
74                 makeInner(d),
75         };
76         inner_2 =  new IntUnaryOperator[] { inner_4[0], inner_4[1], inner_4[0], inner_4[1], };
77         inner_1 =  new IntUnaryOperator[] { inner_4[0], inner_4[0], inner_4[0], inner_4[0], };
78     }
79 
makeInner(final int a)80     private IntUnaryOperator makeInner(final int a) {
81         return new IntUnaryOperator() {
82             @Override
83             public int applyAsInt(int x) {
84                 return x + a;
85             }
86         };
87     }
88 
89     private void setup_lambda(int a, int b, int c, int d) {
90         lambda_4 =  new IntUnaryOperator[] {
91                 makeLambda(a),
92                 makeLambda(b),
93                 makeLambda(c),
94                 makeLambda(d),
95         };
96         lambda_2 =  new IntUnaryOperator[] { lambda_4[0], lambda_4[1], lambda_4[0], lambda_4[1], };
97         lambda_1 =  new IntUnaryOperator[] { lambda_4[0], lambda_4[0], lambda_4[0], lambda_4[0], };
98     }
99 
100     private IntUnaryOperator makeLambda(int a) {
101         return x -> x + a;
102     }
103 
104     public void process(Blackhole bh, IntUnaryOperator[] operations) {
105         for (int i = 0; i < LIMIT; i++) {
106             for (IntUnaryOperator op : operations) {
107                 bh.consume(op.applyAsInt(i));
108             }
109         }
110     }
111 
112     @Benchmark
113     @OperationsPerInvocation(OPERATIONS)
114     public void inner1(Blackhole bh) {
115         process(bh, inner_1);
116     }
117 
118     @Benchmark
119     @OperationsPerInvocation(OPERATIONS)
120     public void inner2(Blackhole bh) {
121         process(bh, inner_2);
122     }
123 
124     @Benchmark
125     @OperationsPerInvocation(OPERATIONS)
126     public void inner4(Blackhole bh) {
127         process(bh, inner_4);
128     }
129 
130     @Benchmark
131     @OperationsPerInvocation(OPERATIONS)
132     public void lambda1(Blackhole bh) {
133         process(bh, lambda_1);
134     }
135 
136     @Benchmark
137     @OperationsPerInvocation(OPERATIONS)
138     public void lambda2(Blackhole bh) {
139         process(bh, lambda_2);
140     }
141 
142     @Benchmark
143     @OperationsPerInvocation(OPERATIONS)
144     public void lambda4(Blackhole bh) {
145         process(bh, lambda_4);
146     }
147 
148 }
149 
150