What is the general approach to doing this in realish time? The benchmarks on this make than untenable, but you could probably RYO KNN and be in the low second

What is the general approach to doing this in realish time? The benchmarks on this make than untenable, but you could probably RYO KNN and be in the low seconds ... that still won't work. Is the approach to build generalized profiles ahead of time and then compare against those in real time?