The stash needs some serious optimization or Legacy will quickly become unplayable for many people

I wasn't feeling starting from scratch on the cycle again but I wanted to check out the event, so I fired up Legacy mode. Now to provide some context, my legacy stash only contains tabs from 0.9 and 1.1 (I played 1.0 in offline mode so those tabs aren't there). I have maybe 10 tabs in my legacy stash and 20 tabs in my 1.1 stash. And still, trying to switch back and forth between my legacy stash and my 1.1 stash is extremely laggy. It takes probably 10 seconds or so to make the switch, and that's after I've done it a few times (it took a lot longer the first time). During that time my cursor lags and becomes very jumpy in its movement.

I know I don't have that many tabs all things considered, and if it's this bad for me, I can only wonder how bad it is for people with a lot more tabs, or how bad it will be if I decide to keep playing more cycles. Dealing with remove-only tabs is already a hassle, compounding it with this kind of lag makes it a lot worse. I hope EHG can find a way to optimize the stash and make this less of an issue, because if not, switching back and forth between cycle and legacy mode simply isn't going to be feasible for a lot of people.