Inventory Limit?

[timmermac]

I'm wondering if anybody has attempted to run a stress test to determine the upper limit of one's quest mode card inventory before serious performance degradation kicks in. The reason I'm currently wondering about this is because one of my more insane ideas for a quest is to find out how long it takes me to get to 100% completion on all sets, which means no card selling, which in turn means my card inventory is going to go very high, very fast. Before I get started with this bit of insanity, I'd like to know if this doomed before it even begins. If not, I might even make it a community challenge. Something along the lines of fastest number of matches to 100% completion gets bragging rights, or something like that.

Edit: Well, I don't know about overall inventory size, but it definitely gets bogged down when the deck size passes roughly 5000.