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.java.lang.invoke;

    24 

    25 import org.openjdk.jmh.annotations.Benchmark;

    26 import org.openjdk.jmh.annotations.BenchmarkMode;

    27 import org.openjdk.jmh.annotations.Mode;

    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 

    33 import java.lang.invoke.MethodHandle;

    34 import java.lang.invoke.MethodHandleProxies;

    35 import java.lang.invoke.MethodHandles;

    36 import java.lang.invoke.MethodType;

    37 import java.util.concurrent.TimeUnit;

    38 

    39 /**

    40  * Benchmark evaluates the performance of MethodHandleProxies.* supplementary methods.

    41  *

    42  * @author Aleksey Shipilev (aleksey.shipilev@oracle.com)

    43  */

    44 @BenchmarkMode(Mode.AverageTime)

    45 @OutputTimeUnit(TimeUnit.NANOSECONDS)

    46 @State(Scope.Thread)

    47 public class MethodHandleProxiesSuppl {

    48 

    49     /*

    50      * Implementation notes:

    51      *   - This is a very naive test, evaluates the performance of service methods.

    52      */

    53 

    54     private Doable instance;

    55 

    56     @Setup

    57     public void setup() throws Throwable {

    58         MethodHandle target = MethodHandles.lookup().findStatic(MethodHandleProxiesSuppl.class, "doWork", MethodType.methodType(int.class, int.class));

    59         instance = MethodHandleProxies.asInterfaceInstance(Doable.class, target);

    60     }

    61 

    62     @Benchmark

    63     public Object baselineReturn() {

    64         return instance;

    65     }

    66 

    67     @Benchmark

    68     public boolean testIsWrapperInstance() {

    69         return MethodHandleProxies.isWrapperInstance(instance);

    70     }

    71 

    72     @Benchmark

    73     public Class<?> testInstanceType() {

    74         return MethodHandleProxies.wrapperInstanceType(instance);

    75     }

    76 

    77     @Benchmark

    78     public MethodHandle testInstanceTarget() {

    79         return MethodHandleProxies.wrapperInstanceTarget(instance);

    80     }

    81 

    82     public static int doWork(int i) {

    83         throw new IllegalStateException("Can't touch this");

    84     }

    85 

    86     public interface Doable {

    87         int doWork(int i);

    88     }

    89 

    90 }