/*
* 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.cache;
import com.google.caliper.BeforeExperiment;
import com.google.caliper.Benchmark;
import com.google.common.collect.MapMaker;
import java.util.Map;
/**
* Compare CacheBuilder and MapMaker performance, ensuring that they remain on par with each other.
*
* @author Nikita Sidorov
*/
public class MapMakerComparisonBenchmark {
private static final String TEST_KEY = "test key";
private static final String TEST_VALUE = "test value";
// Non-loading versions:
private final Map<Object, Object> map = new MapMaker().makeMap(); // Returns ConcurrentHashMap
private final Cache<Object, Object> cache = CacheBuilder.newBuilder().recordStats().build();
private final Cache<Object, Object> cacheNoStats = CacheBuilder.newBuilder().build();
@BeforeExperiment
void setUp() {
map.put(TEST_KEY, TEST_VALUE);
cache.put(TEST_KEY, TEST_VALUE);
cacheNoStats.put(TEST_KEY, TEST_VALUE);
}
@Benchmark void concurrentHashMap(int rep) {
for (int i = 0; i < rep; i++) {
map.get(TEST_KEY);
}
}
@Benchmark void cacheBuilder_stats(int rep) {
for (int i = 0; i < rep; i++) {
cache.getIfPresent(TEST_KEY);
}
}
@Benchmark void cacheBuilder(int rep) {
for (int i = 0; i < rep; i++) {
cacheNoStats.getIfPresent(TEST_KEY);
}
}
}