We're using your RadFileExplorer as imagepicker in our software and are trying to improve the performance of it.
Some users don't sort their images into subfolders but puts all of their images in the root folder, with results high performance drop when not using pager with more than 2000 images in one folder (especially with slow internet connections).
Without pager: 20 seconds until 2 minutes to load
With pager: 5 until 10 seconds to load
But still very slow, we're targeting to 2~3 seconds (maximal).
It seems the thumbnail mode don't caches the generated views because the performance difference between grid and thumbnail modes is very huge, after first load as well. The grid mode seems loads within 1,5 seconds which thumbnail mode takes 5 until 10 seconds.
How we can improve the performance of the FileExplorer with thumbnail mode?