csvkit and SQLite were always too slow whenever I tried to use them for this sort of thing. I don’t remember if I tried xsv. I do think I ended up converting mo

csvkit and SQLite were always too slow whenever I tried to use them for this sort of thing. I don’t remember if I tried xsv. I do think I ended up converting most of my CSVs to TSV, or exporting them as TSV in the first place.