anchor.diff:      ///
       let rec synchronizeEntity initializing relating (contentOld : EntityContent) (content : EntityContent) (origin : Simulant) (entity : Entity) world =
           if contentOld <> content then
  -            let mutable sizeFound = false
               let mutable mountOptFound = false
               let world = synchronizeEventSignals contentOld content origin entity world
               let world = synchronizeEventHandlers contentOld content origin entity world
  -            let world = synchronizeEntityPropertiesFast (initializing, contentOld, content, entity, world, &sizeFound, &mountOptFound)
  +            let world = synchronizeEntityPropertiesFast (initializing, contentOld, content, entity, world, &mountOptFound)
               let world =
                   if initializing then
  -                    let world =
  -                        if not sizeFound
  -                        then World.setEntitySize (World.getEntityQuickSize entity world) entity world |> snd'
  -                        else world
  -                    let world =
  -                        if not mountOptFound && relating
  -                        then World.setEntityMountOpt (Some (Relation.makeParent ())) entity world |> snd'
  -                        else world
  -                    world
  +                    if not mountOptFound && relating
  +                    then World.setEntityMountOpt (Some (Relation.makeParent ())) entity world |> snd'
  +                    else world
                   else world
               match tryDifferentiateChildren<Entity, EntityContent> contentOld content entity with
               | Some (entitiesAdded, entitiesRemoved, entitiesPotentiallyAltered) ->
  
positive.code: #if !DEBUG
          inline
  #endif
          private synchronizeEntityPropertiesFast (initializing, contentOld : EntityContent, content : EntityContent, entity : Entity, world, sizeFound : bool outref, mountOptFound : bool outref) =
          if notNull content.PropertyContentsOpt && content.PropertyContentsOpt.Count > 0 then
              let entity = if notNull (contentOld.EntityCachedOpt :> obj) then contentOld.EntityCachedOpt else entity
              content.EntityCachedOpt <- entity
  
negative.code:                 if not propertyContent.PropertyInitializer || initializing then
                      let lens = propertyContent.PropertyLens
                      match lens.Name with
                      | "MountOpt" -> mountOptFound <- true
                      | _ -> ()
                      let entity = match lens.This :> obj with null -> entity | _ -> lens.This :?> Entity
  