1 /* 2 * Copyright (c) 2016, 2018, 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.corelibs.mapprotos; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.BenchmarkMode; 27 import org.openjdk.jmh.annotations.CompilerControl; 28 import org.openjdk.jmh.annotations.Fork; 29 import org.openjdk.jmh.annotations.Mode; 30 import org.openjdk.jmh.annotations.OutputTimeUnit; 31 import org.openjdk.jmh.annotations.Param; 32 import org.openjdk.jmh.annotations.Scope; 33 import org.openjdk.jmh.annotations.Setup; 34 import org.openjdk.jmh.annotations.State; 35 36 import java.util.Iterator; 37 import java.util.HashMap; 38 import java.util.Map; 39 import java.util.function.IntFunction; 40 import java.util.concurrent.TimeUnit; 41 42 @BenchmarkMode(Mode.AverageTime) 43 @OutputTimeUnit(TimeUnit.MILLISECONDS) 44 @Fork(1) 45 @State(Scope.Thread) 46 public class WalkX extends MapBase { 47 48 IntFunction<Map<Integer, Integer>> mapSupplier; 49 Map<Integer, Integer> map; 50 51 @Param(value = {"org.openjdk.bench.valhalla.corelibs.mapprotos.YHashMap", 52 "org.openjdk.bench.valhalla.corelibs.mapprotos.XHashMap", 53 "java.util.HashMap"}) 54 private String mapType; 55 56 @Setup 57 public void setup() { 58 super.init(size); 59 try { 60 Class<?> mapClass = Class.forName(mapType); 61 mapSupplier = (size) -> newInstance(mapClass, size); 62 } catch (Exception ex) { 63 System.out.printf("%s: %s%n", mapType, ex.getMessage()); 64 return; 65 } 66 67 map = mapSupplier.apply(0); 68 for (Integer k : keys) { 69 map.put(k, k); 70 } 71 } 72 73 Map<Integer, Integer> newInstance(Class<?> mapClass, int size) { 74 try { 75 return (Map<Integer, Integer>)mapClass.getConstructor(int.class).newInstance(size); 76 } catch (Exception ex) { 77 throw new RuntimeException("failed", ex); 78 } 79 } 80 81 @Benchmark 82 public int sumIterator() { 83 int s = 0; 84 for (Iterator<Integer> iterator = map.keySet().iterator(); iterator.hasNext(); ) { 85 s += iterator.next(); 86 } 87 return s; 88 } 89 90 @Benchmark 91 public int sumIteratorHidden() { 92 int s = 0; 93 for (Iterator<Integer> iterator = hide(map.keySet().iterator()); iterator.hasNext(); ) { 94 s += iterator.next(); 95 } 96 return s; 97 } 98 99 @CompilerControl(CompilerControl.Mode.DONT_INLINE) 100 private static Iterator<Integer> hide(Iterator<Integer> it) { 101 return it; 102 } 103 104 }