| /* |
| * Copyright (C) 2010 Google Inc. |
| * |
| * 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 examples; |
| |
| import com.google.caliper.BeforeExperiment; |
| import com.google.caliper.Benchmark; |
| import com.google.caliper.Param; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.Set; |
| |
| public class ContainsBenchmark { |
| @Param({"0", "25", "50", "75", "100"}) private int percentNulls; |
| @Param({"100", "1000", "10000"}) private int containsPerRep; |
| |
| /** the set under test */ |
| private final Set<String> set = new HashSet<String>(); |
| |
| /** twenty-five percent nulls */ |
| private final List<Object> queries = new ArrayList<Object>(); |
| |
| @BeforeExperiment void setUp() { |
| set.addAll(Arrays.asList("str1", "str2", "str3", "str4")); |
| int nullThreshold = percentNulls * containsPerRep / 100; |
| for (int i = 0; i < nullThreshold; i++) { |
| queries.add(null); |
| } |
| for (int i = nullThreshold; i < containsPerRep; i++) { |
| queries.add(new Object()); |
| } |
| Collections.shuffle(queries, new Random(0)); |
| } |
| |
| @Benchmark void contains(int reps) { |
| for (int i = 0; i < reps; i++) { |
| for (Object query : queries) { |
| set.contains(query); |
| } |
| } |
| } |
| } |