question about large-scale use of Pitch objects

[David Nalesnik]

Hi all,

I'm working with very large Scheme lists of pitches in an ly file,
transforming them, and passing them about from function to function.
Right now, I'm using actual Pitch objects (such as you would produce
with ly:make-pitch).  Would it be a better idea to work with pitches
simply as number lists--for example, (0 0 0) for middle C--and
instantiate the pitches only at the end when I'm ready for
typesetting?  This would of course require writing Scheme versions of
ly:pitch-transpose, ly:pitch-diff, and the like.

This may be a "try it and see" type of question, but I thought I would
ask before I embark on such a major revision of my work.

Best,
David