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 
  26 import org.openjdk.jmh.annotations.Benchmark;
  27 import org.openjdk.jmh.annotations.BenchmarkMode;
  28 import org.openjdk.jmh.annotations.Mode;
  29 import org.openjdk.jmh.annotations.OutputTimeUnit;
  30 import org.openjdk.jmh.annotations.Scope;
  31 import org.openjdk.jmh.annotations.State;
  32 
  33 import java.lang.invoke.MethodHandle;
  34 import java.lang.invoke.MethodHandles;
  35 import java.lang.invoke.MethodType;
  36 import java.util.concurrent.TimeUnit;
  37 
  38 /**
  39  * Benchmark assesses MethodHandle.publicLookup() performance
  40  */
  41 @BenchmarkMode(Mode.AverageTime)
  42 @OutputTimeUnit(TimeUnit.NANOSECONDS)
  43 @State(Scope.Thread)
  44 public class LookupPublicFind {
  45 
  46     /*
  47         Implementation notes:
  48             - findSpecial is not tested, unable to do this with public lookup object
  49      */
  50 
  51     @Benchmark
  52     public MethodHandle testConstructor() throws Exception {
  53         return MethodHandles.publicLookup().findConstructor(Victim.class, MethodType.methodType(void.class));
  54     }
  55 
  56     @Benchmark
  57     public MethodHandle testGetter() throws Exception {
  58         return MethodHandles.publicLookup().findGetter(Victim.class, "field", int.class);
  59     }
  60 
  61     @Benchmark
  62     public MethodHandle testSetter() throws Exception {
  63         return MethodHandles.publicLookup().findSetter(Victim.class, "field", int.class);
  64     }
  65 
  66     @Benchmark
  67     public MethodHandle testStatic() throws Exception {
  68         return MethodHandles.publicLookup().findStatic(Victim.class, "staticWork", MethodType.methodType(int.class));
  69     }
  70 
  71     @Benchmark
  72     public MethodHandle testStaticGetter() throws Exception {
  73         return MethodHandles.publicLookup().findStaticGetter(Victim.class, "staticField", int.class);
  74     }
  75 
  76     @Benchmark
  77     public MethodHandle testStaticSetter() throws Exception {
  78         return MethodHandles.publicLookup().findStaticSetter(Victim.class, "staticField", int.class);
  79     }
  80 
  81     @Benchmark
  82     public MethodHandle testVirtual() throws Exception {
  83         return MethodHandles.publicLookup().findVirtual(Victim.class, "virtualWork", MethodType.methodType(int.class));
  84     }
  85 
  86     public static class Victim {
  87 
  88         public static int staticField;
  89         public int field;
  90 
  91         public Victim() {
  92             // do nothing
  93         }
  94 
  95         public int virtualWork() {
  96             return 1;
  97         }
  98 
  99         public static int staticWork() {
 100             return 1;
 101         }
 102 
 103     }
 104 
 105 
 106 }