I have to display a stream of data (at least 1000 items), every `add` to `ModelList` reloads the vie...

# compose

[Bruno_]

I have to display a stream of data (at least 1000 items), every add to ModelList reloads the view, no? Because of that while the items are being loaded the app lags quite a lot, do I have to implement something like a pagination myself or is there a way to optimize such thing out of the box?

[Luca Nicoletti]

Right now there isn’t a component which handles this situation, from what they said, is under development

[Leland Richardson [G]]

yeah right now you’d need to implement this yourself

[Bruno_]

okay well will leave it as it is if that's the case

[Luca Nicoletti]

What if you .addAll() instead of add() every item, is the composition re-triggered on every element?

[Luca Nicoletti]

Or just once with a big lag? 😄

[Bruno_]

@Luca Nicoletti it's a rxjava flowable that collects items from ~20 web sources, already tried to batch it but it didn't help too much

[Leland Richardson [G]]

regardless if you use add vs addall, it should only cause a single recomposition on the next frame. @Model observation doesn’t trigger synchronous recompositions

[Leland Richardson [G]]

so it is already debounced to some degree (ie, roughly ~16ms)

[Leland Richardson [G]]

but for lots of items you’ll still want to do something different

[Leland Richardson [G]]

i would build something out of PagedList, not ModelList, for this use case fwiw

[Ryan Mentley]

Yeah, something to handle this easily is under development