[android-developers] Optimise drawing speed

I am writing a music notation app for android tablets.
As I draw everything (ie. this is not a "simple" image (jpg, pdf, etc) which needs displaying), I need to ensure that the choice of drawing method is the fastest possible.

My options, as I see them at present, are

1. Classic on-screen drawing.
2. Draw on a memory based canvas and bitblt the resulting bitmap onto the screen

Will either option give better rendering time results ?

I have chosen to use classic drawing methods, rather than an OpenGL type surface.
Is this a mistake ?

Any help will be appreciated.
Thank you

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