69 lines
2.0 KiB
Java
69 lines
2.0 KiB
Java
/*
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* Copyright (C) 2011 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.caliper.Param;
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import com.google.common.cache.LocalCache.Segment;
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/**
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* Benchmark for {@code LocalCache.Segment.removeEntryFromChain}.
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*
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* @author Charles Fry
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*/
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public class ChainBenchmark {
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@Param({"1", "2", "3", "4", "5", "6"})
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int length;
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private Segment<Object, Object> segment;
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private ReferenceEntry<Object, Object> head;
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private ReferenceEntry<Object, Object> chain;
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@SuppressWarnings("GuardedBy")
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@BeforeExperiment
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void setUp() {
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LocalCache<Object, Object> cache =
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new LocalCache<>(CacheBuilder.newBuilder().concurrencyLevel(1), null);
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segment = cache.segments[0];
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chain = null;
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for (int i = 0; i < length; i++) {
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Object key = new Object();
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// TODO(b/145386688): This access should be guarded by 'this.segment', which is not currently
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// held
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chain = segment.newEntry(key, cache.hash(key), chain);
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if (i == 0) {
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head = chain;
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}
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}
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}
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@SuppressWarnings("GuardedBy")
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@Benchmark
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int time(int reps) {
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int dummy = 0;
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for (int i = 0; i < reps; i++) {
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// TODO(b/145386688): This access should be guarded by 'this.segment', which is not currently
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// held
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segment.removeEntryFromChain(chain, head);
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dummy += segment.count;
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}
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return dummy;
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}
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}
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