ground lag stuttering(beta patch)

[Buchon]

You mean Intel Hyper Threading ?

Yep, can be a problem, Hyper Threaded cores are not a physical core so they are slowest than a physical one (in short).

But my guess in all this is that its the know issue of the grass and trees code not being optimized yet :

Originally Posted by BlackSix

Known Issues

• Not fully optimized: grass, clouds, and trees. Clouds cause constant FPS drop; grass and trees cause hick-ups. A few extra days of work for this, a few days for grass, few days for clouds, we felt that we could start open testing the patch without waiting for these changes.

The patch in his current state brings smooth play in high and medium altitude, but there still hick-ups at low altitude due to the not fully optimized grass and trees yet.