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 }