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.MethodType; 34 import java.util.concurrent.TimeUnit; 35 36 /** 37 * Benchmark assesses the MethodType.appendParameterTypes() 38 */ 39 @BenchmarkMode(Mode.AverageTime) 40 @OutputTimeUnit(TimeUnit.NANOSECONDS) 41 @State(Scope.Benchmark) 42 public class MethodTypeAppendParams { 43 44 /** 45 * Implementation notes: 46 * - tests multiple cases, gradually appending more arguments 47 * - baselines include just returning the same method type, and calling with empty argument list 48 */ 49 50 private MethodType mt; 51 52 @Setup 53 public void setup() { 54 mt = MethodType.methodType(void.class, int.class); 55 } 56 57 @Benchmark 58 public MethodType baselineRaw() { 59 return mt; 60 } 61 62 @Benchmark 63 public MethodType baselineNop() { 64 return mt.appendParameterTypes(); 65 } 66 67 @Benchmark 68 public MethodType test_A1() { 69 return mt.appendParameterTypes(int.class); 70 } 71 72 @Benchmark 73 public MethodType test_A2() { 74 return mt.appendParameterTypes(int.class, int.class); 75 } 76 77 @Benchmark 78 public MethodType test_A3() { 79 return mt.appendParameterTypes(int.class, int.class, int.class); 80 } 81 82 }