| package org.apache.commons.jcs3.utils.struct; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.util.Map; |
| |
| import org.apache.commons.jcs3.log.Log; |
| import org.apache.commons.jcs3.log.LogManager; |
| import junit.framework.TestCase; |
| |
| /** |
| * This ensures that the jcs version of the LRU map is as fast as the commons |
| * version. It has been testing at .6 to .7 times the commons LRU. |
| * |
| */ |
| public class JCSvsCommonsLRUMapPerformanceTest |
| extends TestCase |
| { |
| /** jcs / commons */ |
| float ratioPut; |
| |
| /** jcs / commons */ |
| float ratioGet; |
| |
| /** goal */ |
| float target = 1.0f; |
| |
| /** loops */ |
| int loops = 20; |
| |
| /** number to test with */ |
| int tries = 100000; |
| |
| /** |
| * A unit test for JUnit |
| * |
| * @throws Exception |
| * Description of the Exception |
| */ |
| public void testSimpleLoad() |
| throws Exception |
| { |
| final Log log = LogManager.getLog( LRUMap.class ); |
| if ( log.isDebugEnabled() ) |
| { |
| System.out.println( "The log level must be at info or above for the a performance test." ); |
| return; |
| } |
| |
| doWork(); |
| assertTrue( this.ratioPut < target ); |
| assertTrue( this.ratioGet < target ); |
| } |
| |
| /** |
| * |
| */ |
| public void doWork() |
| { |
| long start = 0; |
| long end = 0; |
| long time = 0; |
| float tPer = 0; |
| |
| long putTotalJCS = 0; |
| long getTotalJCS = 0; |
| long putTotalHashtable = 0; |
| long getTotalHashtable = 0; |
| |
| String name = "LRUMap"; |
| String cache2Name = ""; |
| |
| try |
| { |
| final Map<String, String> cache = new LRUMap<>( tries ); |
| |
| for ( int j = 0; j < loops; j++ ) |
| { |
| name = "JCS "; |
| start = System.currentTimeMillis(); |
| for ( int i = 0; i < tries; i++ ) |
| { |
| cache.put( "key:" + i, "data" + i ); |
| } |
| end = System.currentTimeMillis(); |
| time = end - start; |
| putTotalJCS += time; |
| tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries ); |
| System.out.println( name + " put time for " + tries + " = " + time + "; millis per = " + tPer ); |
| |
| start = System.currentTimeMillis(); |
| for ( int i = 0; i < tries; i++ ) |
| { |
| cache.get( "key:" + i ); |
| } |
| end = System.currentTimeMillis(); |
| time = end - start; |
| getTotalJCS += time; |
| tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries ); |
| System.out.println( name + " get time for " + tries + " = " + time + "; millis per = " + tPer ); |
| |
| // ///////////////////////////////////////////////////////////// |
| cache2Name = "Commons "; |
| // or LRUMapJCS |
| final Map<String, String> cache2 = new org.apache.commons.collections4.map.LRUMap<>( tries ); |
| // cache2Name = "Hashtable"; |
| // Hashtable cache2 = new Hashtable(); |
| start = System.currentTimeMillis(); |
| for ( int i = 0; i < tries; i++ ) |
| { |
| cache2.put( "key:" + i, "data" + i ); |
| } |
| end = System.currentTimeMillis(); |
| time = end - start; |
| putTotalHashtable += time; |
| tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries ); |
| System.out.println( cache2Name + " put time for " + tries + " = " + time + "; millis per = " + tPer ); |
| |
| start = System.currentTimeMillis(); |
| for ( int i = 0; i < tries; i++ ) |
| { |
| cache2.get( "key:" + i ); |
| } |
| end = System.currentTimeMillis(); |
| time = end - start; |
| getTotalHashtable += time; |
| tPer = Float.intBitsToFloat( (int) time ) / Float.intBitsToFloat( tries ); |
| System.out.println( cache2Name + " get time for " + tries + " = " + time + "; millis per = " + tPer ); |
| |
| System.out.println( "\n" ); |
| } |
| |
| } |
| catch ( final Exception e ) |
| { |
| e.printStackTrace( System.out ); |
| System.out.println( e ); |
| } |
| |
| final long putAvJCS = putTotalJCS / loops; |
| final long getAvJCS = getTotalJCS / loops; |
| final long putAvHashtable = putTotalHashtable / loops; |
| final long getAvHashtable = getTotalHashtable / loops; |
| |
| System.out.println( "Finished " + loops + " loops of " + tries + " gets and puts" ); |
| |
| System.out.println( "\n" ); |
| System.out.println( "Put average for LRUMap = " + putAvJCS ); |
| System.out.println( "Put average for " + cache2Name + " = " + putAvHashtable ); |
| ratioPut = Float.intBitsToFloat( (int) putAvJCS ) / Float.intBitsToFloat( (int) putAvHashtable ); |
| System.out.println( name + " puts took " + ratioPut + " times the " + cache2Name + ", the goal is <" + target |
| + "x" ); |
| |
| System.out.println( "\n" ); |
| System.out.println( "Get average for LRUMap = " + getAvJCS ); |
| System.out.println( "Get average for " + cache2Name + " = " + getAvHashtable ); |
| ratioGet = Float.intBitsToFloat( (int) getAvJCS ) / Float.intBitsToFloat( (int) getAvHashtable ); |
| System.out.println( name + " gets took " + ratioGet + " times the " + cache2Name + ", the goal is <" + target |
| + "x" ); |
| } |
| } |