Sudden lag in latest pre-release.

I haven't played the newest snapshot until today. Last time I tried out a snapshot was before the pre-release came out.

Anyway, suddenly, there is now lag? When move my character, my fps decrease from 60 down to 6-10 fps. This fps drop only decreases when I move my character.

Keep in mind that I did not have this problem prior to the pre-release. What happened??

I hope you guys are able to fix this soon. Thank you!