One of the speed sucks I've noticed is that on the posts listing page (and perhaps pages, WC products, and other CPTs as well, I haven't yet checked) is that the quick-edit feature needs a join to the taxonomies, and that can show up in Query Monitor.
Futhermore, from what I recall, even if you disable Quick Edit, it gets removed from the UI but the now unnecessary query / join continues to happen.
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[ 2.0 ms ] story [ 13.8 ms ] threadFuthermore, from what I recall, even if you disable Quick Edit, it gets removed from the UI but the now unnecessary query / join continues to happen.