Blocks and doors and anything moving takes a second (or more) to update/remove it's self/or open (doors and trap doors) feels like lag but not visibly lagging, only affecting blocks it seems. Breaking a block there is a noticeable wait before it breaks, also watching slimes jump around on my flat world, they kinda just do it in spurts like they are lagged, but no visible lag in players actions and movement.
Related issues
Attachments
Comments


Example of persistent blocks not removed by render thread.
First one is a below view of the persisting block. The second one is me standing inside it.

Can confirm.
Sometimes the (if I understand correctly) new rendering thread seems to have trouble syncing.
As stated above, there is a waiting time occasionally and even more rare it seems to fail removing/adding blocks.
The hitboxes are there, you still collide as well as the bounding box is drawn correctly, but the block doesn't appear.
I posted screenshots to aid my confirmation.
(Sry for the double post, still getting used to the system)

can get 14w29c

Can also confirm. Specs and settings follow
Settings
1GB RAM allocated
http://i.imgur.com/eP4Irtl.png
Specs
Windows 7 Home Premium x64
Java 7v51
8GB RAM
AMD FX 8320 8 core CPU (3.5GHz)
Radeon HD 6950
From what I can gather, this has something to do with the chunk loading process. Turning my Render Distance down seems to alleviate the problem. The issue occurs regardless of VSync , Particle, VBO, Lighting, and Graphics settings, basically all settings in general besides Render Distance. Apparently the OpenGL setting is not in the options menu this build (or I cannot find it), but changing the options via the text file seems to work.

I'm having the same problem to, It's very irritating!

This is a problem with the optimization, if you put the unit can be invisible.