Gabriel Salla

https://mojang.atlassian.net/browse/MC-13632

it's happening to me with 13w22a

West is the right side of the image

wow, 13w12~ is a lot better!

My notebook specs to help:
Intel i5 560M 2.67GHz
4Gb RAM
NVIDIA GeForce GT 420M (There's the integrated video card too, but I always play with the NVIDIA)
Windows 7 64bits
Java 7 with the last update

My minecraft settings:
Graphics: Fancy
Smooth lighting: Minimum at 13w11a and ON at 1.4.7
Particles: Decreased
Render distance: Normal
Performance: Balanced
Advanced OpenGL: ON
VSync: ON

With 1.4.7: ~67 while moving
With 13w11a: ~40fps while moving
I get huge lag spikes when I use simple redstone

@Franco Pellegrini
I don't have a huge fps drop at a new world (with smooth lighting at minimum), but at my place I have a lot!
I get about 40fps in a new world and when I'm moving, it never drops to less than 30fps, but at my place, I usually have 30fps and drops to about 15 when I move or use simple redstone :/

@John Macknight
If I stop, wait for 0 chunck updates and don't change the view I have high fps too... The problem happens when I'm moving

It's a directional bug as you can see in the world upload, but i don't know if it's related with the pistons. If it is, you can close this ticket ^^
It probably is, because it happens with piston/dispenser

But it only happens if I put the redstone after the repeater :/

Now I've tested with a piston and it happens too

It's because his world don't have stairs!
The problem with the smooth lighting is that the minimum option still have the stair lighting bug fixed when it should be the same of 1.4.7...

WITH stair lighting bug fixed even with minimum smooth lighting

WITHOUT stair lighting bug fix

The minimum smooth lighting ISN'T the old smooth lighting as Dinnerbone said, it still have the stair lighting bug fixed!
There's almost no difference between the minimum and maximum in the actual smooth lighting.
The lag persists at actual versions because they didn't removed the stair lighting fix from the minimum option (should be the old one, without the lighting fix).
I'm uploading two screenshots of the same place. The fist one is when there was NO stair lighting fix (smooth lighting on) and the second with the fix but in minimum smooth lightning.
My place have a lot of stairs, it explains the lag I have with the smooth lighting (minimum and maximum). To fix they should remove the stair lighting fix from the minimum option as was the old one

fixed at 13w09c

This is why you search before creating a new issue, can have a lot more informations on the comments.

dragon can't too...

Well, I'm pretty sure they have more important things that really need to be fixed

Sphax: The same for the cauldron... If cauldrons should vanish fire (I think it's totally pointless), lava bucket should burn because when you throw a bucket at lava it burns!
And BTW, why you want the cauldron vanishing entities on fire? As I said, it's pointless...

I have a huge fps drop in snow biome!

I agree, but using 5 layers to a slab height is ugly because it's bigger than a half block :/