I have tried a plethora of PRAGMA settings (automatic_index, synchonous, journal_mode, page_size, cache_size, and more). They do affect timing, just not in a meaningful way. When I'm running the test, there's no other applications running that would cause issues. Running a 'top' shows nothing using significant resources at all. I've moved to using sqlite3.h directly, and given up on QSQLITE because it's just not worth the time and energy at the moment. When I have this project finished up, I'll have more time to look into what about QSQLITE could be causing the issue.

The thing that bugs me though is that I've used this same code in the past with Qt 5.3, kernel 3.8, and an older flavor of Debian, without any issues at all. So something about newer Qt, kernel, or OS is the first breadcrumb. Just don't have to time to pull at that thread just yet. Was hoping someone else has seen these issues, but apparently not.

Thanks for suggestions. Will report back if when I can track it down to hopefully assist anyone else that runs into the issue.