| /* |
| * Copyright (C) 2012 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect; |
| |
| import com.google.caliper.BeforeExperiment; |
| import com.google.caliper.Benchmark; |
| import com.google.caliper.Param; |
| import com.google.common.collect.BenchmarkHelpers.SetImpl; |
| import com.google.common.collect.CollectionBenchmarkSampleData.Element; |
| |
| import java.util.Set; |
| |
| /** |
| * Test iteration speed at various size for {@link Set} instances. |
| * |
| * @author Christopher Swenson |
| */ |
| public class SetIterationBenchmark { |
| @Param({ "3", "6", "11", "23", "45", "91", "181", "362", "724", "1448", |
| "2896", "5793", "11585", "23170", "46341", "92682", "185364", "370728", |
| "741455", "1482910", "2965821", "5931642"}) |
| private int size; |
| |
| // "" means no fixed seed |
| @Param("1234") |
| private SpecialRandom random; |
| |
| @Param({"Immutable", "Hash"}) |
| private SetImpl impl; |
| |
| // the following must be set during setUp |
| private Set<Element> setToTest; |
| |
| @BeforeExperiment void setUp() { |
| CollectionBenchmarkSampleData sampleData = |
| new CollectionBenchmarkSampleData(true, random, 0.8, size); |
| setToTest = impl.create(sampleData.getValuesInSet()); |
| } |
| |
| @Benchmark int iteration(int reps) { |
| int x = 0; |
| |
| for (int i = 0; i < reps; i++) { |
| for (Element y : setToTest) { |
| x ^= System.identityHashCode(y); |
| } |
| } |
| return x; |
| } |
| } |