Hi, we are using Compose for a Big Screen Applicat...

# compose

[Michael Flathe]

Hi, we are using Compose for a Big Screen Application however the scroll performance on the LazyVerticalGrid is really bad. Our Composables are pretty simple. We assign a key to every item and have only one contentType yet it's still lagging noticeably. For the scrolling we are using LazyGridState#animateScrollToItem (no real difference when using LazyGridState#animateScrollBy or a release build with R8 enabled).
Any idea how the scroll performance can be improved or is this just like it is with compose these days? Following a video showing a "full page" scroll. (1.2.1 of compose-ui is used)

1_default.mp4

[Zoltan Demant]

Could you please share some code that makes up the vertical grid?

[Andy Himberger]

Besides the grid itself, the parents & modifiers can be involved. took me a awhile to find a similar looking problem, scrolling was slow because because a parent element had a nestedscroll modifier implemented with an inline "object : " which was being created on every recomposition and causing a lot of extra relayout to run on the whole lazy list, had to add a remember on that object and it was fixed.

[Afzal Najam]

Try using the RecomposeHighlighter modifier to debug whether the items are getting recomposed every frame or whenever you scroll, they shouldn’t be doing that if they are.

Another thing is to try with a release build.