Finally, I've incorporated the final neutrino filter computation code into the validator, so that it will compute the filter as part of parallel validation, or in the case of checkpoint/milestone, it will compute filters in parallel while bypassing the validation checks. This also includes some optimization to bypass metadata population when obtaining prevouts for filter-only computation, since metadata is not required for filter computation. I'm not testing yet the cost of parallel filter computation, with or without validation, though I'll get to that eventually.
(edited)