To save network traffic it would be great to now how many entries a facet list contains without loading the complete facet list. This issue is created because of an out of memory in loading the pivot facet with facet.limit set to -1.
The facet.pivot result would then look like
If you add another new param for example facet.pivot.visible the
result could create less traffic
especially if there are a lot of ids and the param facet.limit=-1 is set