A Flutter UI can be attached during the pre-warm.
The remaining time is joined to the time-to-first-frame latency.

Memory-wise, a cost sample (variable,
depending on the use case) could be:

~4 MB OS’s memory usage for creating pthreads.

~10 MB GPU driver memory.

~1 MB for Dart runtime-managed memory.

~5 MB for Dart-loaded font maps.

Latency-wise,
a cost sample (variable, depending on the use case) could be:

~20 ms to collect the Flutter assets from the application package.

~15 ms to dlopen the Flutter engine library.

~200 ms to create the Dart VM and load the AOT snapshot.

~200 ms to load Flutter-dependent fonts and assets.