Microsoft Edge Canary: Testing Collections tab feature

I just downloaded Microsoft Canary and was testing the new Collections feature to do a comparison between previous "set aside tab" feature. From my experience, it works pretty good until I decide to test if it could save tons of tabs. When I saved tons of tabs (like 30+) I experienced a slow "loading" time of saving all the tabs. Scrolling the tabs I set aside in collections is a havoc and a headache to just to see how slow it would respond to my scrolling. I want to bring this to the developers to see whether they could fix this problem since smooth scrolling is supposing a new feature that's coming up next.