Was answered in Discord. Apparently there really is no difference (apart from long animations taking longer to load first time). So short animations are preferable.
I would like to know which form of animating is better for a 'static' animation (meaning the character just stays in one position).
Would replaying a short animation (<1 sec) be more efficient than replaying a long one (>5 sec)?
To put this into context, I am making animations for the slightly-overused poses of 'At Ease' and 'Bow' (AKA 'Salute'). I am trying to figure out which one of the above options causes less lag.