Anything doing with Genesis unless you converted to a Poser Native figure will be slow because it is running on DSON which is emulating what Studio does. A simple version is you change a dial Poser records that and sends it to DSON which does what ever it needs to do and then sends commands back to Poser after it is done. Consider that Poser 9 did not have sub-division and yet you can use DSON to Sub-D a Genesis figure in that version because DSON creates a proxy and that is always going to take longer then working directly with a mesh.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13