SOPP597: Learning big fugues and 32nd notes

This question was sent by Bill. And he writes, "I put in 15-30 minutes a day working on the sight reading course. I've been working on BWV 543 Bach Prelude & Fugue in A Minor mostly beyond that. Two things that frustrate me are it takes me about 3 months to learn these big fugues (practicing about 1.5 hours/day) and the playing the strings of 32nd notes evenly at high tempo. Any suggestions to speed up learning and play better at high tempos would be appreciated. I do like the sight reading course, it certainly has me reading better! Regards, Bill"