Roland Ruckerbauer

Since I updated to 1.8.4 all my performance issues were gone. I first thought, it was because I started using the new minecraft launcher with the integrated java runtime, but further inspections showed, that it was the 1.8.4 update itself, which fixed it. To verify this, I downloaded the jar launcher, and launched minecraft with my default jre, and performance was similar good to the test with the integrated jre.

It feels strange, that my laptop was not able to handle all 1.8.* versions, but is able to handle 1.8.4 perfectly at nearly constant 60fps.

@qmagnet
I do not think it is some software bug outside minecraft.
I can not really prove this, but I tried this:
*Installed a fresh archlinux(pretty basic distribution, no gui, just the basic needed processes)

*Installed java

*Installed xserver architecture(and the radeon driver)

*Installed the sound systems

*Tried minecraft(instead of 4 fps I get something between 9 and 14)
allocated all of my 7.6 free gigs of ram for minecraft

*Uninstalled java and installed java 8
Roughly same results as above

*Tried java 6
Feels like it is better(but fps are the same)

@AleX Gibbs
You said, that you get strange looking pixels on far flat areas? I have them too, both on linux(newest radeon driver) and windows(newest graphics driver). I do not know what you mean with the "rainbow" thing. If i generate a flat world it is almost impossible to determine, what happens on the last chunks you can see, because of this pixels(they hide everything under themselfs).

No that should not be the reason for me. I have a dual core cpu with hyper threading (4 cores). Also the use of the cpu stays always very low(in difference to older versions).

I tested the final 1.8 release yesterday. The performance is as bad as in 1.8-pre3. Eventually it is the exact same version?

I just tested 1.8-pre3 on my linux system(same hardware). I am using the default radeon driver not the fglrx one, and it works pretty good.
Linux: ~30fps
Windows: ~1 to 4 fps(rapidly changing)

But I miss the behavior of 1.7.10. With 1.7.10 I had always more than 90 fps.

When I pause the game, then suddenly the chunks are loaded and rendered in hyper speed?
I noticed this, while I was walking around. On the far sky I am able to see new chunks being loaded and rendered very slow. Entering the pause menu let minecraft render and load new chunks in incredible speed. But the framerate is still at 3fps. In my opinion this is really strange. Something has to be messed up.

Hey seems, that I got the same problem. In minecraft 1.7.10 I got up to 110 fps, and most of the time they did not get under 90 frames per second. But now since the new updates(I tried 1.8-pre1, 1.8-pre2, and 1.8-pre4) I get 20 fps in average, even if I do not move. When I begin to move the fps are going down to 3 or less. It is not even playable now. Also world loading and saving takes forever. I play both in 1.7.10 and in the 1.8 pre releases with full graphics setting except the view distance(I set it to 10 chunks). I hope somebody will fix this before the final 1.8 update.

My specs:
intel core i5 3.1GHZ
8gb DDR3
samsung SSD with 1gb cache(its pretty fast)
ATI radeon hd 6630 with 1gb dedicated vram.

windows 7 64 bit
java 1.7.0_67 64 bit