Batched face clustering
The Face Clustering task is done by default in a single run with all of the user's faces. The time of this task seems to increase exponentially depending on the number of faces to be grouped, which is not feasible if the user has many images.
In order to improve this behavior, Batched clustering was implemented in Face Recognition v0.9.51. It is still done with all the user's faces, but it is done by dividing all the faces into several batches to improve the times involved.
This is an advanced setting and therefore is not found in the administrator panel. To configure it, you must use the nextcloud occ command.
$ occ config:app:set facerecognition clustering_batch_size --value='1000' --type=integer
