1 /* 2 * Copyright (C) 2012 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect; 18 19 import com.google.caliper.BeforeExperiment; 20 import com.google.caliper.Benchmark; 21 import com.google.caliper.Param; 22 import com.google.common.collect.BenchmarkHelpers.SetImpl; 23 24 /** 25 * This is meant to be used with {@code --measureMemory} to measure the memory usage of various 26 * {@code Set} implementations. 27 * 28 * @author Christopher Swenson 29 */ 30 public class SetCreationBenchmark { 31 @Param({ 32 "3", "6", "11", "23", "45", "91", "181", "362", "724", "1448", "2896", "5793", "11585", "23170", 33 "46341", "92682", "185364", "370728", "741455", "1482910", "2965821", "5931642" 34 }) 35 private int size; 36 37 // "" means no fixed seed 38 @Param("1234") 39 private SpecialRandom random; 40 41 @Param({"ImmutableSetImpl", "HashSetImpl"}) 42 private SetImpl impl; 43 44 // the following must be set during setUp 45 private CollectionBenchmarkSampleData sampleData; 46 47 @BeforeExperiment setUp()48 void setUp() { 49 sampleData = new CollectionBenchmarkSampleData(true, random, 0.8, size); 50 } 51 52 @Benchmark creation(int reps)53 int creation(int reps) { 54 int x = 0; 55 for (int i = 0; i < reps; i++) { 56 x ^= System.identityHashCode(impl.create(sampleData.getValuesInSet())); 57 } 58 return x; 59 } 60 } 61