Position interpolation should be disabled for our-of-view entities.

[ElectroJr]

I.e., if an entity is far away from a player's view, then it doesn't need to lerp (which causes recursive move events & lookup tree updates). Not really significant for most games, but becomes a significant source of slowdown for replays or servers where PVS is disabled.

[metalgearsloth]

EyeManager should really have an easy way to get all viewports (i.e. the main one + everything under viewsubscriptions).