Hi, I'm using
collectAsState()
with a flow that emits new values very frequently, about 10 times a second. The problem is that the
SnapshotStateObserver.applyMaps
property keeps growing and consumes more and more memory over time. This can be reproduced with the code below. A heap dump shows that after 50,000 iterations there is a single instance of
androidx.compose.runtime.snapshots.SnapshotStateObserver$ApplyMap[]
that consumes about 100 MB. As it seems to be by design that
applyMaps
can only grow, is there a fundamental issue with my code, or is there another approach I could use for frequent updates without eventually running out of memory?
class TestState {
private val scope = CoroutineScope(Dispatchers.Default)
val value = MutableStateFlow(0)
init {
scope.launch {
while (true) {
value.value = value.value + 1
delay(100)
}
}
}
}
@Composable
fun App() {
val state = remember { TestState() }
val value = state.value.collectAsState()
Text("value = ${value.value}")
}
