| package org.apache.jcs.util.struct; |
| |
| import java.util.Map; |
| |
| import junit.framework.Test; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| |
| import org.apache.jcs.TestJCSvHashtablePerf; |
| import org.apache.jcs.utils.struct.LRUMap; |
| |
| /** |
| * 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. |
| * |
| * @author aaronsm |
| * |
| */ |
| public class TestLRUMapPerf extends TestCase |
| { |
| |
| float ratioPut = 0; |
| |
| float ratioGet = 0; |
| |
| float target = 1.0f; |
| |
| int loops = 20; |
| |
| int tries = 50000; |
| |
| /** |
| * @param testName |
| */ |
| public TestLRUMapPerf(String testName) |
| { |
| super( testName ); |
| } |
| |
| /** |
| * A unit test suite for JUnit |
| * |
| * @return The test suite |
| */ |
| public static Test suite() |
| { |
| return new TestSuite( TestLRUMapPerf.class ); |
| } |
| |
| /** |
| * A unit test for JUnit |
| * |
| * @exception Exception |
| * Description of the Exception |
| */ |
| public void testSimpleLoad() throws Exception |
| { |
| 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 |
| { |
| |
| Map 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 = "LRUMapJCS (commons)"; |
| //or LRUMapJCS |
| Map cache2 = new org.apache.commons.collections.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 (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 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" ); |
| |
| } |
| |
| /** |
| * @param args |
| */ |
| public static void main( String args[] ) |
| { |
| TestJCSvHashtablePerf test = new TestJCSvHashtablePerf( "command" ); |
| test.doWork(); |
| } |
| |
| |
| |
| } |