removing images takes too long
Removing images take too long, probably because of updating lighttable view each time image is removed.
For example film roll with around 1K of images completely erased within around 2 minutes.
Also its not only just long, but also if you remove only some images lighttable is jumping with each image erased causing troubles in selecting image (and hence eliminating all benefits of background removal)
I'd suggest to immediately hide all deleted and continue in background or do this in foreground without updates to lighttable until done.