Performance optimization

[vauvenal5]

Loading big lists of images needs further optimization. Two obvious issues are that we are sorting the image list in the main thread and that we are merging lists in the main thread.

• [x] move merge to background
• [x] move sorting to background

[jakobroehrl]

With 500 pics the reload time is about 3 secs, this is ok for me. But If I show all of my pics (10000) I can't wait till a realod is done.

[vauvenal5]

This is actually already considered fixed. Since the two operations mentioned here are already in the background thread.

As far as I know there is currently no pagination implemented in Nextcloud, so I do not have any choice then loading the full list of images. Not sure that I can do anything more here.

What would be the expected behavior from your point of view?

[vauvenal5]

See also this https://github.com/vauvenal5/yaga/issues/80

[vauvenal5]

And this: https://github.com/nextcloud/ios/issues/845