d3fin3d

Yes, this problem persists in 14w02c

FPS seems a lot smoother and faster in the latest snapshot.

Although the FPS and smoothness of default has improved slightly with 13w12~, the core issue remains. I believe, as Jeb has mentioned, this ultimately is due to the new texture pack format:

The following results use the settings:

Distance: Normal
Graphics: Fancy
Smooth lighting: On/Maximum (there is no difference in performance between minimum/maximum)

13w12~

Default: 40-50 FPS (70 FPS looking at the sky - 75 FPS looking at the ground)
16x: 35-50 FPS (60 FPS looking at the sky - 65 FPS looking at the ground)
32x: 25-45 FPS (45 FPS looking at the sky - 50 FPS looking at the ground)
64x: 10-20 FPS (20 FPS looking at the sky - 30 FPS looking at the ground)

Note: Although slightly smoother, frames are generally stuttery and unsmooth, no matter the figure in f3.

1.5:

Default: 25-40 FPS (120 FPS looking at the sky)
16x: 20-35 FPS (70 FPS looking at the sky)
32x: 15-30 FPS (50 FPS looking at the sky)
64x: 10-20 FPS (20 FPS looking at the sky)

Note: All frames are generally stuttery and unsmooth, no matter the figure in f3.

1.4.7:

Default: 35-60 FPS (200 FPS looking at the sky)
16x: 35-60 FPS (200 FPS looking at the sky)
32x: 35-60 FPS (180 FPS looking at the sky)
64x: 35-60 FPS (180 FPS looking at the sky)

Note: All frames are smooth.

As this issue is related but not specifically focussed on here, I have raised a separate ticket dealing with FPS with both default and various HD texture pack resolutions.

I can confirm that with the default textures:

Render distance: Normal
Fancy graphics.

Smooth lighting off: Stable 60-70 FPS.
Smooth lighting set to either minimum or maximum: Very stuttery 20-30 FPS.

With smooth lighting on, if I leave my player idle for a few minutes, then look around horizontally from a stationary position, frames are smooth at 60-90 FPS (170 looking up, 110 looking down). The second I move my player, the stutturing returns for several minutes.

I'm also experiencing some very extreme stuttering with my newly converted 64x texture pack, "Defscape". The pack completely overhauls pretty much every Minecraft texture and has some custom animations (water, lava, compass) which may contribute to the screen lag.

With a 64x texture pack:

Render distance: Normal
Fancy graphics.

Smooth lighting off: Very stuttery 15-20 FPS. (The framerate here tends to display inaccurately, with occasions where it jumps to 60+ but the screen is still very clearly jerky)
Smooth lighting set to either minimum or maximum: Extremely stuttery 10-15 FPS. (Again, inaccurately displayed FPS jumps)

No amount of standing still and idling fixes the jerkyness with a 64x texture pack running.

I believe the texture pack lag is also due to both the lighting updates and the new tp format.

Ezekiel (or anyone else) If you'd like to test the severity of the 64x or 32x lag and the difference between 1.5 and 1.4.x, here are the different packs:

Defscape 64x 1.5
Defscape 32x 1.5

Defscape 64x 1.4.7
Defscape 32x 1.4.7

AMD Phenom X4 64, 4GB Ram, Windows 7 64, ATI Radeon HD 7770, latest java.

I'm also experiencing this. It looks as though experience orbs are also bug-flickering.

To confirm, this issue exists on the PC version too. I've had to manually enter the hosts network IP and randomly generated port to continue to play via LAN.