1 /* 2 * Copyright (c) 2019, 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.valhalla.sandbox.corelibs.corelibs.mapprotos; 24 25 26 import org.openjdk.jmh.annotations.Benchmark; 27 import org.openjdk.jmh.annotations.BenchmarkMode; 28 import org.openjdk.jmh.annotations.Fork; 29 import org.openjdk.jmh.annotations.Measurement; 30 import org.openjdk.jmh.annotations.Mode; 31 import org.openjdk.jmh.annotations.OutputTimeUnit; 32 import org.openjdk.jmh.annotations.Param; 33 import org.openjdk.jmh.annotations.Scope; 34 import org.openjdk.jmh.annotations.Setup; 35 import org.openjdk.jmh.annotations.State; 36 import org.openjdk.jmh.annotations.Warmup; 37 38 import java.util.Arrays; 39 import java.util.HashMap; 40 import java.util.LinkedHashMap; 41 import java.util.Map; 42 import java.util.function.IntFunction; 43 import java.util.concurrent.TimeUnit; 44 45 /** 46 * Simple benchmark of toArray. 47 */ 48 49 @BenchmarkMode(Mode.AverageTime) 50 @OutputTimeUnit(TimeUnit.NANOSECONDS) 51 @Fork(1) 52 @State(Scope.Thread) 53 public class HashMapToArray { 54 55 private IntFunction<Map<Integer, Integer>> mapSupplier; 56 Map<Integer, Integer> map; 57 58 59 @Param(value = { 60 "org.openjdk.bench.valhalla.corelibs.mapprotos.HashMap", 61 // "org.openjdk.bench.valhalla.corelibs.mapprotos.XHashMap", 62 "java.util.HashMap", 63 }) 64 private String mapType; 65 66 @Param({"1", "10", "1000", "100000"}) 67 public int size; 68 69 @Setup 70 public void setup() { 71 try { 72 Class<?> mapClass = Class.forName(mapType); 73 mapSupplier = (size) -> newInstance(mapClass, size); 74 } catch (Exception ex) { 75 System.out.printf("%s: %s%n", mapType, ex.getMessage()); 76 return; 77 } 78 79 map = mapSupplier.apply(0); 80 for (int i = 0; i < size; i++) { 81 map.put(i, i * i); 82 } 83 } 84 85 Map<Integer, Integer> newInstance(Class<?> mapClass, int size) { 86 try { 87 return (Map<Integer, Integer>)mapClass.getConstructor(int.class).newInstance(size); 88 } catch (Exception ex) { 89 throw new RuntimeException("failed", ex); 90 } 91 } 92 93 @Benchmark 94 public Object[] testKeySetToArray() { 95 return map.keySet().toArray(); 96 } 97 98 @Benchmark 99 public Object[] testKeySetToArrayTyped() { 100 return map.keySet().toArray(new Integer[0]); 101 } 102 103 @Benchmark 104 public Object[] testValuesToArray() { 105 return map.values().toArray(); 106 } 107 108 @Benchmark 109 public Object[] testValuesToArrayTyped() { 110 return map.values().toArray(new Integer[0]); 111 } 112 }