I've found (and locally fixed) an annoying performance bug on @X web! TLDR: go to a post with a lot of replies, and scroll up and down - notice it's laggy? There's a component that calculates the scroll parent, and then removes the scroll listener when unmounting. But it seems we don't even have a scroll listener most of the time, so we can avoid the heavy _getScrollParent function by wrapping it in a conditional This removes seconds of forced reflow and lag for me Would love to get it fixed! 🙏🏻 @X @XEng @elonmusk @nikitabier