com.mchange.v2.coalesce.CoalesceTest Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v2.coalesce;
public class CoalesceTest
{
final static int NUM_ITERS = 10000;
final static Coalescer c = CoalescerFactory.createCoalescer( null, true, true );
public static void main( String[] argv )
{
doTest();
System.gc();
System.err.println("num coalesced after gc: " + c.countCoalesced());
}
private static void doTest()
{
String[] strings = new String[ NUM_ITERS ];
for (int i = 0; i < NUM_ITERS; ++i)
strings[i] = new String( "Hello" );
long start_time = System.currentTimeMillis();
for (int i = 0; i < NUM_ITERS; ++i)
{
Object random = strings[i];
Object normal = c.coalesce( random );
// System.err.println( System.identityHashCode( random ) +
// "\t" +
// System.identityHashCode( normal ) );
}
long time_ms = System.currentTimeMillis() - start_time;
System.out.println("avg time: " + time_ms / ((float) NUM_ITERS) +
"ms (" + NUM_ITERS + " iterations)");
System.err.println("num coalesced: " + c.countCoalesced());
}
}