import java.awt.*; 
import java.awt.event.*; 

class GraphicsPaintPerformance extends Frame // javax.swing.JFrame 
{ 
   int [] x = null; 
   int [] y = null; 
    
   public static void main( String [] args ) 
   { 
      new GraphicsPaintPerformance(); 
   } 
    
   GraphicsPaintPerformance() 
   { 
      int N = 20000; 
      x = new int[N]; 
      y = new int[N]; 
       
      for( int i = 0; i < N; i++ ) 
      { 
         x[i] = (int)( 500 * Math.random() + 50 ); 
         y[i] = (int)( 500 * Math.random() + 80 ); 
      } 
       
      setSize( 600, 630 ); 
      setVisible( true ); 
       
      addWindowListener( new WindowAdapter() 
      { 
         public void windowClosing( WindowEvent we ) 
         { 
            System.exit(0); 
         } 
      }); 
   } 
    
   public void paint( Graphics g ) 
   { 
      long start = System.currentTimeMillis(); 
       
      int n = x.length; 
      for( int i = 1; i < n; i++ ) 
      { 
         g.drawLine( x[i-1], y[i-1], x[i], y[i] ); 
      } 
       
      g.setColor( Color.WHITE ); 
      g.fillRect( 250, 280, 100, 100 ); 
       
       
      g.setColor( Color.BLACK ); 
      g.drawString( 0.001 * ( System.currentTimeMillis() - start ) + " s", 280, 335 ); 
   } 
}