Post Scan Optimisation
Regarding things posted at maximum quantity.
Currently, the addon scans AH for that item before determining that it was posted at a max quantity. It would be much quicker (and Blizz would like it too, I guess) if it instead checked the Inventory DB for amounts posted. Instead of doing long scans for every item.
That’s not how posting works. You need to scan the AH to see what price you’re going to post at.
But you first check if you have no maximum amount posted. You could first check this against Inventory DB, and only then check the ones that can be posted, how much they should be posted for.