anchor.diff:              let world = dispatcher.Update (entity, world)
               let facets = entity.GetFacets world
               let world =
  -                if Array.notEmpty facets
  +                if Array.notEmpty facets // OPTIMIZATION: avoid lambda allocation.
                   then Array.fold (fun world (facet : Facet) -> facet.Update (entity, world)) world facets
                   else world
               if World.getEntityPublishUpdates entity world then
  
positive.code:             let dispatcher = entity.GetDispatcher world
              let world = dispatcher.Actualize (entity, world)
              let facets = entity.GetFacets world
              if Array.notEmpty facets
              then Array.fold (fun world (facet : Facet) -> facet.Actualize (entity, world)) world facets
              else world
  
  
negative.code:             let world = dispatcher.PostUpdate (entity, world)
              let facets = entity.GetFacets world
              let world =
                  if Array.notEmpty facets // OPTIMIZATION: avoid lambda allocation.
                  then Array.fold (fun world (facet : Facet) -> facet.PostUpdate (entity, world)) world facets
                  else world
              if World.getEntityPublishPostUpdates entity world then
  