66 lines
1.9 KiB
Java
66 lines
1.9 KiB
Java
/*
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* Copyright (C) 2012 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.cache;
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import com.google.caliper.BeforeExperiment;
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import com.google.caliper.Benchmark;
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import com.google.common.collect.MapMaker;
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import java.util.Map;
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/**
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* Compare CacheBuilder and MapMaker performance, ensuring that they remain on par with each other.
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*
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* @author Nikita Sidorov
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*/
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public class MapMakerComparisonBenchmark {
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private static final String TEST_KEY = "test key";
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private static final String TEST_VALUE = "test value";
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// Non-loading versions:
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private final Map<Object, Object> map = new MapMaker().makeMap(); // Returns ConcurrentHashMap
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private final Cache<Object, Object> cache = CacheBuilder.newBuilder().recordStats().build();
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private final Cache<Object, Object> cacheNoStats = CacheBuilder.newBuilder().build();
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@BeforeExperiment
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void setUp() {
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map.put(TEST_KEY, TEST_VALUE);
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cache.put(TEST_KEY, TEST_VALUE);
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cacheNoStats.put(TEST_KEY, TEST_VALUE);
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}
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@Benchmark
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void concurrentHashMap(int rep) {
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for (int i = 0; i < rep; i++) {
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map.get(TEST_KEY);
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}
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}
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@Benchmark
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void cacheBuilder_stats(int rep) {
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for (int i = 0; i < rep; i++) {
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cache.getIfPresent(TEST_KEY);
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}
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}
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@Benchmark
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void cacheBuilder(int rep) {
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for (int i = 0; i < rep; i++) {
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cacheNoStats.getIfPresent(TEST_KEY);
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}
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}
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}
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