FP 9: Fullbrowser images transition from left to right using scrollrect LAGS. helP

hi guys, basically quick rundown is:

  1. container1–>bitmap image with bitmapData.
  2. container2–>bitmap image with bitmapdata.
  3. im using the latest tweenmax
  4. have correctly added a 2 seperate scrollrects to container1 and container2 that takes the width and height of the stage.
  5. tweenmax is only moving the rectangles.

I get the effect i want, however, it still lags a choppy animation. Anyone know how come?