@kiwidude: did you run the create experiment more than once? There seems to be a first-time problem. I ran the test, and it created a few duplicate groups, taking 22 seconds! I then deleted the records from the DB using SQLiteSpy and ran it again. This time it took 1.3 seconds. Around 15 more runs all produce the same number.
I am thinking that the first time it runs, it needs to auto-create the indices or some such. Do you have evidence one way or the other?
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