Just an addition that this doesn't happen on the Settings page at least. Followers page, it happens for a bit while 'loading more'.
Also, i should have mentioned, this is not happening with other sites on my devices – text entry & CPU usage for Tweetdeck, Youtube, Reddit to name a few, is totally normal.
Well i don't know if anything actually changed, but now it runs perfectly fine on both platforms. I could only max it out around 50% by scrolling like a maniac. ¯\_(ツ)_/¯
I'm having the same issue, actually, on both iOS and macOS.
Text entry is extremely laggy and hard to work with as a result.
Having the same problem, share modal is unusably slow on mobile Safari, I'm running a 1st-gen iPad Pro.
using the site on mac safari and ios safari is super laggy now, and peeking in activity monitor shows it's consuming 100%+ of CPU when i scroll. typing in any text field has like a quarter of a second of lag on both my phone and pc on multiple Pages and multiple pages. haven't noticed this before today. i turned off my userscripts/adblock and got the same behavior so i dont think that's it. can't check any other browsers right now though