And yet ChatGPT does not use it.

GP was mentioning that a solution to the problem exists, not that Netflix specifically invented it. Your quip that the technique is not specific to Netflix bolsters the argument that OpenAI should code that in.

I'm ignorant of the tech here. But I have noticed that ctrl-F search doesn't work for me on these longer chats. Which is what made me think they were doing something like virtual scrolling. I can't understand how the UI can get so slow if a bunch of the page is being swapped out.

Ctrl-A for select all doesn't work either. I actually wondered how they broke that.

They didn't actually name the solution: the solution is virtualization.

They described Netflix's implementation, but if someone actually wanted to follow up on this (even for their own personal interest), Dynamic HTML would not get you there, while virtualization would across all the places it's used: mobile, desktop, web, etc.

Its been about three years but infinite scroll is naunced depending on the content that needs to be displayed. Its a tough nut to crack and can require a lot of maintenance to keep stable.

None of which chatgpt can handle presumably.

Yes, tables and lists, since they have a fixed height per item/row. Chat messages don't have a fixed height so its more difficult. And by more difficult I mean that every single virtual paging library that I've looked at in the past would not work.

But they do have constant height in the sense that, unless you resize the window horizontally, the height doesn’t change.

For what it’s worth, modern browsers can render absurdly large plain HTML+CSS documents fairly well except perhaps for a slow initial load as long as the contents are boring enough. Chat messages are pretty boring.

I have a diagnostic webpage that is a few million lines long. I could get fancy and optimize it, but it more or less just works, even on mobile.

Exactly, browsers can render it fast. It's likely a re-rendering issue in React. So the real solution is just preventing the messages from getting rendered too often instead of some sort of virtual paging.

Dynamic height of virtual scrolling elements is a thing. You just need to recalculate the scrollable height on the fly. tanstack's does it, as do some of the nicer grid libraries.

To be fair I haven't looked at any solutions in about a decade lol