Example: Test the performance of connection pooling

import java.sql.*;
import javax.naming.*;
import java.util.*;
import javax.sql.*;

public class ConnectionPoolingTest
{
    public static void main(java.lang.String[] args)
    throws Exception
    {
        Context ctx = new InitialContext();
        // Do the work without a pool:
        DataSource ds = (DataSource) ctx.lookup("BaseDataSource");
        System.out.println("\nStart timing the non-pooling DataSource version...");

        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100; i++) {
            Connection c1 = ds.getConnection();
            c1.close();
        }
        long endTime = System.currentTimeMillis();
        System.out.println("Time spent: " + (endTime - startTime));

        // Do the work with pooling:
        ds = (DataSource) ctx.lookup("PoolingDataSource");
        System.out.println("\nStart timing the pooling version...");

        startTime = System.currentTimeMillis();
        for (int i = 0; i < 100; i++) {
            Connection c1 = ds.getConnection();
            c1.close();
        }
        endTime = System.currentTimeMillis();
        System.out.println("Time spent: " + (endTime - startTime));
    }
}