Unridden minecarts and locomotives nearly stop

[dubbeanh]

I don't know the exact distance, but I would guesstimate about 16-20 blocks away, minecarts (and railcraft locomotives) nearly stop. They proceed at a snail's pace until a player gets close enough, then the cart remembers its old velocity and continues on at that previous speed until the same 16-20 block distance from player.

[Dockter]

@liach any clues on this?

[dubbeanh]

Is there an algorithm that cuts down entity movement when players aren't in the immediate vicinity? I notice most entities exhibit a behavior not unlike this.

[liach]

entity activation.

[dubbeanh]

culprit?