/*
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* Copyright (C) 2010 Google Inc.
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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 benchmarks;
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import java.util.HashMap;
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import java.util.Hashtable;
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import java.util.LinkedHashMap;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* How do the various hash maps compare?
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*/
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public class HashedCollectionsBenchmark {
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public void timeHashMapGet(int reps) {
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HashMap<String, String> map = new HashMap<String, String>();
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map.put("hello", "world");
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for (int i = 0; i < reps; ++i) {
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map.get("hello");
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}
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}
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public void timeHashMapGet_Synchronized(int reps) {
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HashMap<String, String> map = new HashMap<String, String>();
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synchronized (map) {
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map.put("hello", "world");
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}
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for (int i = 0; i < reps; ++i) {
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synchronized (map) {
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map.get("hello");
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}
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}
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}
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public void timeHashtableGet(int reps) {
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Hashtable<String, String> map = new Hashtable<String, String>();
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map.put("hello", "world");
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for (int i = 0; i < reps; ++i) {
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map.get("hello");
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}
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}
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public void timeLinkedHashMapGet(int reps) {
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LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
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map.put("hello", "world");
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for (int i = 0; i < reps; ++i) {
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map.get("hello");
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}
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}
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public void timeConcurrentHashMapGet(int reps) {
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ConcurrentHashMap<String, String> map = new ConcurrentHashMap<String, String>();
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map.put("hello", "world");
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for (int i = 0; i < reps; ++i) {
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map.get("hello");
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}
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}
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}
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