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.cache; 18 19 import com.google.caliper.BeforeExperiment; 20 import com.google.caliper.Benchmark; 21 import com.google.common.collect.MapMaker; 22 import java.util.Map; 23 24 /** 25 * Compare CacheBuilder and MapMaker performance, ensuring that they remain on par with each other. 26 * 27 * @author Nikita Sidorov 28 */ 29 @SuppressWarnings("CheckReturnValue") 30 public class MapMakerComparisonBenchmark { 31 private static final String TEST_KEY = "test key"; 32 private static final String TEST_VALUE = "test value"; 33 34 // Non-loading versions: 35 private final Map<Object, Object> map = new MapMaker().makeMap(); // Returns ConcurrentHashMap 36 private final Cache<Object, Object> cache = CacheBuilder.newBuilder().recordStats().build(); 37 private final Cache<Object, Object> cacheNoStats = CacheBuilder.newBuilder().build(); 38 39 @BeforeExperiment setUp()40 void setUp() { 41 map.put(TEST_KEY, TEST_VALUE); 42 cache.put(TEST_KEY, TEST_VALUE); 43 cacheNoStats.put(TEST_KEY, TEST_VALUE); 44 } 45 46 @Benchmark concurrentHashMap(int rep)47 void concurrentHashMap(int rep) { 48 for (int i = 0; i < rep; i++) { 49 map.get(TEST_KEY); 50 } 51 } 52 53 @Benchmark cacheBuilder_stats(int rep)54 void cacheBuilder_stats(int rep) { 55 for (int i = 0; i < rep; i++) { 56 cache.getIfPresent(TEST_KEY); 57 } 58 } 59 60 @Benchmark cacheBuilder(int rep)61 void cacheBuilder(int rep) { 62 for (int i = 0; i < rep; i++) { 63 cacheNoStats.getIfPresent(TEST_KEY); 64 } 65 } 66 } 67