Some performance bottlenecks seem to be still in. I added around 200 images and 10 videos of my last vacation manually via Intent to the Immich app on Android.

The startup of the Activity is VERY slow. Images are rendered one by one in the list view (potentially in full resolution?) and the scrolling in the list is quite slow. The upload button does not keep the "uploading" state but after some time jumps back to the initial "start upload" state. Going into background or turning the screen off sometimes stops the upload. This test was done on my Samsung S23 Ultra (so CPU power should not be the issue).

Nevertheless the upload works as expected if I stay in the app and keep the screen active. Seems like this is not really the intended way of uploading things to Immich (auto upload is).