/* This file is part of VoltDB.
* Copyright (C) 2008-2009 VoltDB L.L.C.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
public class ReflectionBench {
public static void main(String[] args) throws Exception {
Object object = new Object();
Class<?> c = Object.class;
int loops = 100000;
long start = System.currentTimeMillis();
for( int i = 0; i < loops; i++ )
{
object.toString();
}
System.out.println( loops + " regular method calls:" + (System.currentTimeMillis() - start) + " milliseconds." );
java.lang.reflect.Method method = c.getMethod( "toString" );
start = System.currentTimeMillis();
for( int i = 0; i < loops; i++ )
{
method.invoke( object );
}
System.out.println( loops + " reflective method calls without lookup:" + (System.currentTimeMillis() - start) + " milliseconds." );
start = System.currentTimeMillis();
for( int i = 0; i < loops; i++ )
{
method = c.getMethod( "toString" );
method.invoke( object );
}
System.out.println( loops + " reflective method calls with lookup:" + (System.currentTimeMillis() - start) + " milliseconds." );
}
}