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 }