is DirectGraphics slower?

Hi,

I am using Series_60_MIDP_SDK_for_SYMBIAN_OS_v_1_0

I tried to scroll a large Image both with DirectGraphics and Graphics. And I think Graphics is really faster.

public void paint(Graphics g)
{
x++;
if (x == this.getWidth()) x = 0;

if (dg==null) dg=DirectUtils.getDirectGraphics(g);

if (c)
dg.drawImage(myImage,-1*x,0,20,0);
else
g.drawImage(myImage,-1*x,0,20);
}


any idea or experince, why native call is slower than to MIDP implementation?

or am I doing something wrong?

thank you