| package org.apache.commons.jcs; |
| |
| /* |
| * 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 junit.framework.Test; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| import org.apache.commons.jcs.access.CacheAccess; |
| import org.apache.commons.jcs.engine.memory.lru.LRUMemoryCache; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import java.util.Hashtable; |
| |
| /** |
| * This test ensures that basic memory operations are with a speficified order of magnitude of the |
| * java.util.Hashtable. |
| * <p> |
| * Currenlty JCS is un 2x a hashtable for gets, and under 1.2x for puts. |
| */ |
| public class JCSvsHashtablePerformanceTest |
| extends TestCase |
| { |
| /** jcs / hashtable */ |
| float ratioPut = 0; |
| |
| /** jcs / hashtable */ |
| float ratioGet = 0; |
| |
| /** ration goal */ |
| float target = 3.50f; |
| |
| /** Times to run the test */ |
| int loops = 20; |
| |
| /** how many puts and gets to run */ |
| int tries = 50000; |
| |
| /** |
| * @param testName |
| */ |
| public JCSvsHashtablePerformanceTest( String testName ) |
| { |
| super( testName ); |
| } |
| |
| /** |
| * A unit test suite for JUnit |
| * @return The test suite |
| */ |
| public static Test suite() |
| { |
| return new TestSuite( JCSvsHashtablePerformanceTest.class ); |
| } |
| |
| /** |
| * A unit test for JUnit |
| * @throws Exception Description of the Exception |
| */ |
| public void testSimpleLoad() |
| throws Exception |
| { |
| Log log1 = LogFactory.getLog( LRUMemoryCache.class ); |
| if ( log1.isDebugEnabled() ) |
| { |
| System.out.println( "The log level must be at info or above for the a performance test." ); |
| return; |
| } |
| Log log2 = LogFactory.getLog( JCS.class ); |
| if ( log2.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; |
| |
| try |
| { |
| |
| JCS.setConfigFilename( "/TestJCSvHashtablePerf.ccf" ); |
| CacheAccess<String, String> cache = JCS.getInstance( "testCache1" ); |
| |
| for ( int j = 0; j < loops; j++ ) |
| { |
| |
| String 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 ); |
| |
| // ///////////////////////////////////////////////////////////// |
| name = "Hashtable"; |
| Hashtable<String, String> cache2 = new Hashtable<String, String>(); |
| 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( name + " 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( name + " get time for " + tries + " = " + time + "; millis per = " + tPer ); |
| |
| System.out.println( "\n" ); |
| } |
| |
| } |
| catch ( Exception e ) |
| { |
| e.printStackTrace( System.out ); |
| System.out.println( e ); |
| } |
| |
| long putAvJCS = putTotalJCS / loops; |
| long getAvJCS = getTotalJCS / loops; |
| long putAvHashtable = putTotalHashtable / loops; |
| 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 JCS = " + putAvJCS ); |
| System.out.println( "Put average for Hashtable = " + putAvHashtable ); |
| ratioPut = Float.intBitsToFloat( (int) putAvJCS ) / Float.intBitsToFloat( (int) putAvHashtable ); |
| System.out.println( "JCS puts took " + ratioPut + " times the Hashtable, the goal is <" + target + "x" ); |
| |
| System.out.println( "\n" ); |
| System.out.println( "Get average for JCS = " + getAvJCS ); |
| System.out.println( "Get average for Hashtable = " + getAvHashtable ); |
| ratioGet = Float.intBitsToFloat( (int) getAvJCS ) / Float.intBitsToFloat( (int) getAvHashtable ); |
| System.out.println( "JCS gets took " + ratioGet + " times the Hashtable, the goal is <" + target + "x" ); |
| |
| } |
| |
| /** |
| * @param args |
| */ |
| public static void main( String args[] ) |
| { |
| JCSvsHashtablePerformanceTest test = new JCSvsHashtablePerformanceTest( "command" ); |
| test.doWork(); |
| } |
| |
| } |