Draggable TF with Device Fonts

All:

I’ve read about a billion posts on using device fonts or embedding fonts and all the other miscellaneous whatnot.

On a dynamically loaded text box I acheive the clarity I want with a device font.

HOWEVER:

The TF is in a draggable box. When I use the crisp device font, the dragging performance is less than when I embed the font (ie the box lags more). Is this due to the clarity or is there something else to it? If I had an embedded font with the same clarity would it still lag as badly? Thanks a lot.

J