I feel like Orion just goes nuts when we have a tab group with 150+ tabs (even if most of them are suspended). I see this behavior on both Mac and iOS but it's more visible in iOS, the app takes around 30 seconds to open on an iPhone 14 pro max, for example
It's not really a feature request, just optimization.
Swiping between tabs in ergonomic view is extremely laggy as of recently. Scrolling through the tab sidebar is practically unusable and freezes often. This was not happening in 1.3.13 Testflight. Note I have 200 tabs and swiping between them was never an issue until now.
The browser should be usable with 200 tabs. The only lag I had in the past was if I were to swipe through all the tabs at once. Iām only ever switching between 5-10 tabs at a time and lag was never an issue. Clearing my browsing data helps for a while but then performance goes down hill.
1.3.14
18
I've also been having serious lag when managing tabs, but I only have 8-10 tabs open at a time generally. Any time I switch tabs, add a tab, close a tab, or move a tab to another tab group, there is about 1-3 seconds of delay between when I tap a button and when it acts.
I'm attaching a video to show, but it might be hard to tell when I'm tapping; just assume I'm moving as fast as your average power user. 
Because Murphy's law, it's not behaving as slowly in the video as it typically is.
I'm on an iPhone 13 Mini running latest Orion from the App Store. I've disabled all my plugins/extensions to make sure those weren't the issue.
(Unintentional soundtrack by Glasvegas and Black Moth Super Rainbow.)
