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/*
* 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.Runner;
import com.google.caliper.SimpleBenchmark;
import com.google.common.base.Function;
import com.google.common.base.Functions;
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 extends SimpleBenchmark {
private static final String TEST_KEY = "test key";
private static final String TEST_VALUE = "test value";
private static final Function<Object, Object> IDENTITY = Functions.identity();
// Loading/computing versions:
private final Map<Object, Object> computingMap = new MapMaker().makeComputingMap(IDENTITY);
private final LoadingCache<Object, Object> loadingCache =
CacheBuilder.newBuilder().recordStats().build(CacheLoader.from(IDENTITY));
private final LoadingCache<Object, Object> loadingCacheNoStats =
CacheBuilder.newBuilder().build(CacheLoader.from(IDENTITY));
// 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();
@Override
public void setUp() {
map.put(TEST_KEY, TEST_VALUE);
cache.put(TEST_KEY, TEST_VALUE);
cacheNoStats.put(TEST_KEY, TEST_VALUE);
}
public void timeComputingMapMaker(int rep) {
for (int i = 0; i < rep; i++) {
computingMap.get(TEST_KEY);
}
}
public void timeLoadingCacheBuilder_stats(int rep) {
for (int i = 0; i < rep; i++) {
loadingCache.getUnchecked(TEST_KEY);
}
}
public void timeLoadingCacheBuilder(int rep) {
for (int i = 0; i < rep; i++) {
loadingCacheNoStats.getUnchecked(TEST_KEY);
}
}
public void timeConcurrentHashMap(int rep) {
for (int i = 0; i < rep; i++) {
map.get(TEST_KEY);
}
}
public void timeCacheBuilder_stats(int rep) {
for (int i = 0; i < rep; i++) {
cache.getIfPresent(TEST_KEY);
}
}
public void timeCacheBuilder(int rep) {
for (int i = 0; i < rep; i++) {
cacheNoStats.getIfPresent(TEST_KEY);
}
}
public static void main(String[] args) {
Runner.main(MapMakerComparisonBenchmark.class, args);
}
}
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