```@Composable fun MyComposable() { // Store the value of count using remember var count by ...

# compose

[theapache64]

@Composable
fun MyComposable() {
    // Store the value of count using remember
    var count by remember { mutableStateOf(0) }
    // Compute the derived state based on count
    val doubledCount by
        derivedStateOf {
            println("MainActivity:MyComposable:derivedStateOf")
            count * 2
        }
    Column {
        // Update the count when a button is clicked
        Button(onClick = { count++ }) {
            Text("Increment Count: $count")
        }
        // Display the derived state
        Text("Doubled Count: $doubledCount")
    }
}

Even though derivedStateOf ’s body called twice (because we don’t have remember around it), the value is correct.
• Why (or how?) is this happening?
• Why there’s no infinite recomposition? 👀

[theapache64]

Output

Screen Recording 2023-06-14 at 03.32.54.mov

[shikasd]

Think about the derived state as a lambda that caches the return value if inputs (states) didn't change
If you don't memoize such lambda, it is still going to evaluate correctly, you just won't get caching benefits

[shikasd]

There's a bit more to it in this case, e.g. it is slightly more expensive for recomposition, as it has to track new states each time
And also you don't need a derived state here at all, tbh, as count changes as often as doubled count

[theapache64]

Understood. This is a minimised version to repro the issue. Thanks 🙂