World wont load when exploring and massive frame drops.

When exploring the map I run into a part that has not loaded yet and will not load for either a long time or not until i quit and restart. When walking into the unloaded area everything unloads and I can only see mobs. (i7 3770, GTX 1070, 8 gb ddr3 RAM)

Also my other computer is experiencing massive frame drops when exploring. Before the update neither of these issues happened. It has an i7 870, GTX 650ti and 4 gigs of ddr3 RAM. Before it could play with most settings turned up but now even when i turn them down I still experience the drops and stutters.

The update is great in terms of features but unfortunately the performance issues are causing my experience to be very irritating.

Thanks.