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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package org.openjdk.bench.java.lang.invoke; 26 27 28 import org.openjdk.jmh.annotations.Benchmark; 29 import org.openjdk.jmh.annotations.BenchmarkMode; 30 import org.openjdk.jmh.annotations.Mode; 31 import org.openjdk.jmh.annotations.OutputTimeUnit; 32 import org.openjdk.jmh.annotations.Scope; 33 import org.openjdk.jmh.annotations.State; 34 35 import java.lang.invoke.MethodHandle; 36 import java.lang.invoke.MethodHandles; 37 import java.lang.invoke.MethodType; 38 import java.util.concurrent.TimeUnit; 39 40 /** 41 * Benchmark assesses MethodHandle.lookup() performance 42 */ 43 @BenchmarkMode(Mode.AverageTime) 44 @OutputTimeUnit(TimeUnit.NANOSECONDS) 45 @State(Scope.Thread) 46 public class LookupDefaultFind { 47 48 /* 49 Implementation notes: 50 - does not test findSpecial, since the privileges of this Bench is not enough to access private members 51 */ 52 53 @Benchmark 54 public MethodHandle testConstructor() throws Exception { 55 return MethodHandles.lookup().findConstructor(Victim.class, MethodType.methodType(void.class)); 56 } 57 58 @Benchmark 59 public MethodHandle testGetter() throws Exception { 60 return MethodHandles.lookup().findGetter(Victim.class, "field", int.class); 61 } 62 63 @Benchmark 64 public MethodHandle testSetter() throws Exception { 65 return MethodHandles.lookup().findSetter(Victim.class, "field", int.class); 66 } 67 68 @Benchmark 69 public MethodHandle testStatic() throws Exception { 70 return MethodHandles.lookup().findStatic(Victim.class, "staticWork", MethodType.methodType(int.class)); 71 } 72 73 @Benchmark 74 public MethodHandle testStaticGetter() throws Exception { 75 return MethodHandles.lookup().findStaticGetter(Victim.class, "staticField", int.class); 76 } 77 78 @Benchmark 79 public MethodHandle testStaticSetter() throws Exception { 80 return MethodHandles.lookup().findStaticSetter(Victim.class, "staticField", int.class); 81 } 82 83 @Benchmark 84 public MethodHandle testVirtual() throws Exception { 85 return MethodHandles.lookup().findVirtual(Victim.class, "virtualWork", MethodType.methodType(int.class)); 86 } 87 88 public static class Victim { 89 90 public static int staticField; 91 public int field; 92 93 public Victim() { 94 // do nothing 95 } 96 97 public int virtualWork() { 98 return 1; 99 } 100 101 public static int staticWork() { 102 return 1; 103 } 104 105 private int specialWork() { 106 return 1; 107 } 108 109 } 110 111 }