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 26 * usage of various {@code Set} implementations. 27 * 28 * @author Christopher Swenson 29 */ 30 public class SetCreationBenchmark { 31 @Param({ "3", "6", "11", "23", "45", "91", "181", "362", "724", "1448", 32 "2896", "5793", "11585", "23170", "46341", "92682", "185364", "370728", 33 "741455", "1482910", "2965821", "5931642"}) 34 private int size; 35 36 // "" means no fixed seed 37 @Param("1234") 38 private SpecialRandom random; 39 40 @Param({"Immutable", "Hash"}) 41 private SetImpl impl; 42 43 // the following must be set during setUp 44 private CollectionBenchmarkSampleData sampleData; 45 46 @BeforeExperiment void setUp() { 47 sampleData = new CollectionBenchmarkSampleData(true, random, 0.8, size); 48 } 49 50 @Benchmark int creation(int reps) { 51 int x = 0; 52 for (int i = 0; i < reps; i++) { 53 x ^= System.identityHashCode(impl.create(sampleData.getValuesInSet())); 54 } 55 return x; 56 } 57 } 58
