If you go ahead and memorize it, you'll end up able to play it faster.
dear brogerswhat is the usual way? memorization or sight reading bach inventions?sincerely yours
if you see Glenn Gould playing Invention no 1, in youtube, you may see that this Invention isnt to fast. If you play it to fast, you`l lose a certain kind of tenderness it has.
I don't know why so many look to Gould's performances as the ultimate arbiter of tempo in these inventions. His tempo works for him, sort of. I still find it eccentrically and willfully slow. There are, as so often in Bach's music, many valid approaches. (Despite the efforts of didactic youtube "Bach scholars" to enforce single, "historically accurate" tempi.)