viewport: lazy loading

[flavono123]

Is your feature request related to a problem? Please describe.
when i render over a 10k lines of string, updating is lagging with a low responsive

Describe the solution you'd like
only render the set content then lazy load for others, the out of current content

Describe alternatives you've considered
idk

Additional context
will attach simple codes to reproduce soon

[meowgorithm]

Hey @flavono123! This is a good one, thanks for filing an issue against it.

Please do include some sample code when you can: it will make it a lot easier for us to look into this one (a gist is fine if you need to include a large amount of data).

[flavono123]

hello @meowgorithm

first, my assumption was wrong. just only 10k lines of string do not occur lags to bubbletea's rending lifecycle.
as you said it might be related retrieving some amount of data.
i observed this issue in my personal project, which is not distributed yet, so tricky to explain to reproduce i could if you want.

you may close this issue is not urgent.