WATCH THIS VIDEO:
https://www.youtube.com/watch?v=VtOaQVAkmIo&feature=youtu.be

Before you dismiss this as a duplicate of a previous bug, please hear what I have to say. This is a different kind of lag, a different kind of stuttering which I have never seen before. What happens, is the game periodically freezes, at about half second intervals. This is of course, also accompanied by a large frame rate drop. Minecraft has never been this unplayable before, and I would appreciate a serious effort to fix this bug.

Please watch the video I have uploaded to fully understand the nature of this bug.

I'd attribute this bug to the new fast rendering system implemented in one of the very recent snapshots, and while it has been present since then, it has never been this severe until now.

Furthermore, from the tests I did, it only seems to occur on a render distance of 16.