// Calculates the mean pixel value pixel
// by pixel and by calling the getStatistics().

  start = getTime;		
  w=getWidth();
  h=getHeight();
  sum = 0;
  for (y=0; y<h; y++)
     for (x=0; x<w;x++)
        sum += getPixel(x,y);
  t1 = getTime-start;
  print(sum/(w*h), t1)

  start = getTime;
  getStatistics(area, mean2);		
  t2 = getTime-start;
  print(mean2, t2+" ("+t1/t2+" times faster)");