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 MethodHandle.bindTo() binding performance 40 */ 41 @BenchmarkMode(Mode.AverageTime) 42 @OutputTimeUnit(TimeUnit.NANOSECONDS) 43 @State(Scope.Thread) 44 public class MethodHandleBindToBinding { 45 46 /* 47 Implementation notes: 48 - calls static method to avoid binding "this" 49 - tests binding costs with multiple depth (C1, C2, C3) 50 - baseline includes naive side effect store 51 - lowering the binding cost will minimise both the spread between C1/C2/C3 and difference towards baseline 52 - this test performance will never reach the baseline 53 */ 54 55 private MethodHandle mhOrig; 56 57 @Setup 58 public void setup() throws Throwable { 59 mhOrig = MethodHandles.lookup().findStatic(MethodHandleBindToBinding.class, "doWork", 60 MethodType.methodType(Integer.class, Integer.class, Integer.class, Integer.class)); 61 } 62 63 @Benchmark 64 public Object baselineRaw() { 65 return mhOrig; 66 } 67 68 @Benchmark 69 public Object testBind_C1() throws Throwable { 70 MethodHandle mhCurry1 = mhOrig.bindTo(1); 71 return mhCurry1; 72 } 73 74 @Benchmark 75 public Object testBind_C2() throws Throwable { 76 MethodHandle mhCurry1 = mhOrig.bindTo(1); 77 MethodHandle mhCurry2 = mhCurry1.bindTo(2); 78 return mhCurry2; 79 } 80 81 @Benchmark 82 public Object testBind_C3() throws Throwable { 83 MethodHandle mhCurry1 = mhOrig.bindTo(1); 84 MethodHandle mhCurry2 = mhCurry1.bindTo(2); 85 MethodHandle mhCurry3 = mhCurry2.bindTo(3); 86 return mhCurry3; 87 } 88 89 public static Integer doWork(Integer a, Integer b, Integer c) { 90 return 31*(31*(31*a + b) + c); 91 } 92 93 }