I added parallel SQL query execution here:

• Research running SQL in table view in parallel using asyncio.gather() #1723

My hunch is that this will take advantage of multiple cores, since Python's sqlite3 module releases the GIL once a query is passed to SQLite.

I'd really like to prove this is the case though. Just not sure how to do it!

Larger question: is this performance optimization actually improving performance at all? Under what circumstances is it worthwhile?