Unexpected UI Freeze with Heavy Computation in Jetpack Compose on Android 14
I'm trying to debug I've been struggling with this for a few days now and could really use some help. I'm stuck on something that should probably be simple. I'm experiencing an issue where my Jetpack Compose UI freezes when I perform heavy computations inside a composable function. I've tried using `LaunchedEffect` and coroutines to handle background computations, but it doesn't seem to alleviate the problem. The freezing typically occurs when the user interacts with the UI, such as scrolling or clicking buttons. I'm using the latest version of Jetpack Compose (1.4.0). Here's a snippet of my code that illustrates the issue: ```kotlin @Composable fun HeavyComputationScreen() { var result by remember { mutableStateOf("") } // This is a placeholder for a heavy computation fun performHeavyComputation() { // Simulating a heavy task Thread.sleep(3000) // Simulating delay result = "Computation Complete!" } LaunchedEffect(Unit) { performHeavyComputation() } Text(text = result) } ``` In this example, the UI is completely unresponsive while `performHeavyComputation` is executing. I expected the UI to remain responsive and update once the computation is complete. I've also tried moving the computation to a `ViewModel`, but the issue persists. My ViewModel looks like this: ```kotlin class MyViewModel : ViewModel() { private val _result = MutableLiveData<String>() val result: LiveData<String> = _result fun performHeavyComputation() { viewModelScope.launch { // Simulating a heavy task withContext(Dispatchers.Default) { Thread.sleep(3000) } _result.value = "Computation Complete!" } } } ``` And in the Composable: ```kotlin @Composable fun HeavyComputationScreen(viewModel: MyViewModel) { val result by viewModel.result.observeAsState("") Button(onClick = { viewModel.performHeavyComputation() }) { Text(text = "Start Computation") } Text(text = result) } ``` Despite using `Dispatchers.Default`, the UI still freezes during the heavy computation. Is there something specific I might be missing in terms of best practices for handling heavy computations in Jetpack Compose? Any suggestions would be greatly appreciated. Any help would be greatly appreciated! I'm working on a mobile app that needs to handle this. What's the best practice here?