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 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.Setup; 27 28 import java.util.Arrays; 29 import java.util.Collections; 30 import java.util.HashMap; 31 import java.util.Map; 32 import java.util.function.IntFunction; 33 34 public class ReplX extends MapBase { 35 IntFunction<Map<Integer, Integer>> mapSupplier; 36 Integer[] mixed; 37 Map<Integer, Integer> map; 38 39 @Setup 40 public void setup() { 41 super.init(size); 42 try { 43 Class<?> mapClass = Class.forName(mapType); 44 mapSupplier = (size) -> newInstance(mapClass, size); 45 46 map = mapSupplier.apply(0); 47 for (Integer k : keys) { 48 map.put(k, k); 49 } 50 mixed = new Integer[size]; 51 System.arraycopy(keys, 0, mixed, 0, size / 2); 52 System.arraycopy(nonKeys, 0, mixed, size / 2, size / 2); 53 Collections.shuffle(Arrays.asList(mixed), rnd); 54 } catch (Exception ex) { 55 System.out.printf("%s: %s%n", mapType, ex.getMessage()); 56 return; 57 } 58 } 59 60 Map<Integer, Integer> newInstance(Class<?> mapClass, int size) { 61 try { 62 return (Map<Integer, Integer>)mapClass.getConstructor(int.class).newInstance(size); 63 } catch (Exception ex) { 64 throw new RuntimeException("failed", ex); 65 } 66 } 67 68 @Benchmark 69 public Map<Integer, Integer> replace() { 70 Integer[] keys = this.keys; 71 for (Integer k : mixed) { 72 if (map.size() < size) { 73 map.put(k, k); 74 } else { 75 map.remove(k); 76 } 77 } 78 return map; 79 } 80 81 }