This might be a silly question... but something I'd use to do in the view system (like pre lollipop ...

# compose-android

[Colton Idle]

This might be a silly question... but something I'd use to do in the view system (like pre lollipop or something) would be to put a CircularProgressBar on the screen and if it stutters then you know you'd be doing something on the main thread. It was a trivial way to test for jank. This was later changed in views to render on the renderThread but you could disable the renderThread in the manifest or something.

Is there a way to do that in compose? i.e. I just want to put a circular progress bar on the screen and see if some of my background code is causing jank.

[Zoltan Demant]

StrictMode? 😃

[yschimke]

Maybe wire up JankStats as a State and display that? Turn the frame metrics into something visible?

[Joel Denke]

https://developer.android.com/jetpack/androidx/releases/tracing
Would check this out :)

[Ben Trengrove [G]]

You could also use the Profile HWUI rendering setting in developer options, it draws a graph on your screen to show jank

https://developer.android.com/topic/performance/rendering/inspect-gpu-rendering

[Tolriq]

HWUI for ever also help finding things like https://issuetracker.google.com/issues/297231233