not sure if Arnold issue or Houdini but rendering in viewport with rendersettings from stage is much faster than rendering with Husk to disk.

things I tried:
- made viewport resolution same rendersettings res
- render everything with a single process (worse)
- double checked the viewport is reading the rendersettings from stage
- tried flipbooking but it wasnt updating the vdb sequence from disk and I was getting the same frame of the smoke for the whole flipbook duration.