Sorry, I simply haven't been able to find them. However, the upshot was that in my FemCal app, loading several months of entered fertility cycles went from 100's-1000's of milliseconds to just a few 100's.

The overall speedup when loading was about 50x, when using NSArchive versus sqlite3. Neither implementation was or has been optimized, though I did try to write the sqlite3 code as efficiently as possible, since it was clearly a source of slowness from day 1.