Twilight Forest lag

[Roflcoptor]

Hello everyone.I have a strange problem on my server... When someone is exploring in the Twilight Forest (1 person is enough) the main world starts to lag, but the twilight forest world doesn't lag at all.

Using FTB Ultimate 1.4.7

 

[Zelfana]

Normal world generation lag, nothing you can do except tell people to explore when there's no one else online to get affected.

 

[Roflcoptor]

Normal world generation lag, nothing you can do except tell people to explore when there's no one else online to get affected.

But shouldn't it also lag in the twilight? There is no trace of lag there, while the normal world is suffering from it.