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.MethodHandles; 35 import java.lang.invoke.MethodType; 36 import java.util.concurrent.TimeUnit; 37 38 /** 39 * Benchmark assesses MethodHandles.insertArguments() performance 40 */ 41 @BenchmarkMode(Mode.AverageTime) 42 @OutputTimeUnit(TimeUnit.NANOSECONDS) 43 @State(Scope.Benchmark) 44 public class MethodHandlesInsertArguments { 45 46 /** 47 * Implementation notes: 48 * - this test is similar to MethodHandleBindToCurryBench 49 * - calling static method to have consistent arg list without receiver type 50 * - using volatile ints as arguments to prevent opportunistic optimizations 51 * - using Integers to limit argument conversion costs 52 */ 53 54 private MethodHandle mhOrig; 55 private MethodHandle mhCurry1; 56 private MethodHandle mhCurry2; 57 private MethodHandle mhCurry3; 58 59 private volatile Integer arg1 = 42; 60 private volatile Integer arg2 = 43; 61 private volatile Integer arg3 = 44; 62 63 @Setup 64 public void setup() throws Throwable { 65 mhOrig = MethodHandles.lookup().findStatic(MethodHandlesInsertArguments.class, "doWork", MethodType.methodType(int.class, Integer.class, Integer.class, Integer.class)); 66 mhCurry1 = MethodHandles.insertArguments(mhOrig, 0, arg1); 67 mhCurry2 = MethodHandles.insertArguments(mhOrig, 0, arg1, arg2); 68 mhCurry3 = MethodHandles.insertArguments(mhOrig, 0, arg1, arg2, arg3); 69 } 70 71 @Benchmark 72 public int baselineRaw() throws Throwable { 73 return doWork(arg1, arg2, arg3); 74 } 75 76 @Benchmark 77 public int invoke_C0() throws Throwable { 78 return (int) mhOrig.invokeExact(arg1, arg2, arg3); 79 } 80 81 @Benchmark 82 public int invoke_C1() throws Throwable { 83 return (int) mhCurry1.invokeExact(arg2, arg3); 84 } 85 86 @Benchmark 87 public int invoke_C2() throws Throwable { 88 return (int) mhCurry2.invokeExact(arg3); 89 } 90 91 @Benchmark 92 public int invoke_C3() throws Throwable { 93 return (int) mhCurry3.invokeExact(); 94 } 95 96 public static int doWork(Integer a, Integer b, Integer c) { 97 return 31*(31*(31*a + b) + c); 98 } 99 100 }