To optimize that multiplication we repeatedly double the point, & sum appropriate doublings.
Beyond that in the context of my hypothetical, unlike IRL implementations: No special effort's needed to optimize or secure!
I can feed the formulas to my hypothetical FPMA (which I re-summarized yesterday) via an algebraic optimizer/solver I discussed in a tangent upon GPS!
A shift register I included for parsing compressed files & bitfields can be reused to iterate over the key's bits.
4/4!