returning from facets to the original result takes too long

[myrmoteras]

using a facet takes a lot of time, both going to the facet, and back to the oriingal result

http://z2.punkish.org/v2/treatments?facets=true&stats=true&treatmentTitle=Carabus

http://z2.punkish.org/v2/treatments?facets=true&stats=true&journalTitle=ZooKeys&treatmentTitle=Carabus takes 12 sec to get the result

getting back to http://z2.punkish.org/v2/treatments?facets=true&stats=true&treatmentTitle=Carabus takes 11 sec