Thanks for your advise.
I have not heard of the blitmask before.
this is the code that is running slow: TweenMax.to(latestSc,1.5,{x:500,y:372,scaleX:60,scaleY:60,alpha:0});
Basically its a text field that enlarges and fades at the same time, its only usually 2 numbers in the text field, so its not a field that is very full of text, would something like that benefit from blitmask?
I suspect its the alpha change that it is struggling on.