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.vm.lambda.capture; 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 30 import java.util.Comparator; 31 import java.util.concurrent.TimeUnit; 32 33 /** 34 * measure lambda capture 35 * 36 * @author Sergey Kuksenko (sergey.kuksenko@oracle.com) 37 */ 38 @BenchmarkMode(Mode.AverageTime) 39 @OutputTimeUnit(TimeUnit.NANOSECONDS) 40 public class Capture2 { 41 42 public static class StaticInner implements Comparator<Integer> { 43 @Override 44 public int compare(Integer x, Integer y) { 45 return (x < y) ? -1 : ((x > y) ? 1 : 0); 46 } 47 } 48 49 public class InstanceInner implements Comparator<Integer> { 50 @Override 51 public int compare(Integer x, Integer y) { 52 return (x < y) ? -1 : ((x > y) ? 1 : 0); 53 } 54 } 55 56 57 @Benchmark() 58 public Comparator<Integer> anonymous(){ 59 return new Comparator<Integer>() { 60 @Override 61 public int compare(Integer x, Integer y) { 62 return (x < y) ? -1 : ((x > y) ? 1 : 0); 63 } 64 }; 65 } 66 67 @Benchmark() 68 public Comparator<Integer> inner(){ 69 return new InstanceInner(); 70 } 71 72 @Benchmark() 73 public Comparator<Integer> inner_static(){ 74 return new StaticInner(); 75 } 76 77 @Benchmark() 78 public Comparator<Integer> lambda(){ 79 return (x, y) -> (x < y) ? -1 : ((x > y) ? 1 : 0); 80 } 81 82 public Comparator<Integer> mref_static(){ 83 return Integer::compare; 84 } 85 86 @Benchmark() 87 public Comparator<Integer> mref_unbound(){ 88 return Integer::compareTo; 89 } 90 91 @Benchmark() 92 public Comparator<Integer> mref_bound(){ 93 return this::compareInteger; 94 } 95 96 public int compareInteger(Integer x, Integer y) { 97 return (x < y) ? -1 : ((x > y) ? 1 : 0); 98 } 99 100 101 }