IssueTracker

Use case 1

LazyColumnFor(items) {
   Text("$it", Modifier.background(Color.Red))
}

We scroll such list few pixels(no new items composed as a result)

Draw performance is: 124397 ns

Now we add a layer

LazyColumnFor(items) {
   Text("$it", Modifier.drawLayer().background(Color.Red))
}

Draw performance is: 63371 ns (50% less)

Use case 2

LazyColumnFor(items) {
   var color by remember { mutableStateOf(Color.Red) }
   Text("$it", Modifier.clickable(indication = null) {
       color = Color.Green
   }.drawBehind {
       drawRect(color)
   })
}

Invalidating only one item:

Without layers on each item: 1137259 ns

With layers: 113771 ns (90% less).

We should have a way for a layouts to insert layers for children