[MC-75704] Chunk loading slower in 1.8.2-pre3 than in 1.8.1

Chunk loading in 1.8.2-pre1, -pre2, -pre3 seems to be much slower than in 1.8.1
The performance is comparable to 1.7.X versions and below.
Steps to reproduce:
1.Create a new world (you can see both default and superflat world types on the screenshots below) using 1.8 or 1.8.1 version.
2.Chunk loading is quite fast, isn't it?
3.Save and quit to title, then quit game.
4.Now launch 1.8.2-pre3 (affects pre2 and pre1 as well) version and enter the world.
5.Compare chunk loading speed in 1.8.1 and in 1.8.2-pre3.

Linked issues

is duplicated by 2

MC-75768 Chunk loading slower in 1.8.2-pre1 Resolved

MC-76015 Slow Chunk Load Resolved

Attachments

Comments 21

Christie N 2014-12-23T18:31:32Z

Your fog looks odd; is your game modded?

Vladislav 2014-12-23T18:39:18Z

No, it isn't.

Jacob Sargent 2014-12-25T17:16:03Z

Higher FOV?

wobst.michael 2014-12-25T17:28:41Z

Confirmed. See my comments:

http://www.reddit.com/r/Minecraft/comments/2pobzb/minecraft_182pre1_christmas_gift_edition/cmyylnj
http://www.reddit.com/r/Minecraft/comments/2pobzb/minecraft_182pre1_christmas_gift_edition/cmyysvb

It's also confirmed by Grum: http://www.reddit.com/r/Minecraft/comments/2pobzb/minecraft_182pre1_christmas_gift_edition/cmyysvb?context=3

kumasasa 2014-12-28T09:59:53Z

@unknown wrote:

Yeah, when you limit your fps chunk-loading is slow now :/

Something we should fix now it works better on slower machines.

11 more comments

wobst.michael 2014-12-28T11:05:42Z

Please see the other links I have posted. What Grum says is only the half-truth. Even if the FPS is not limited, the 'chunk updates' value dropped from an average of 400-600 to an average of ~90. All the benefits with fast chunk loading they introduced in 1.8 are basically gone in 1.8.2-pre1.

Felipe González Martín 2014-12-31T12:04:09Z

Why when I've got more than 20 chunks Minecraft crashes at Save and Quit to Title?

Lucas Ignacio Morrison Osorio 2015-01-08T14:35:22Z

@FeliGM, your issue is MC-38527

wobst.michael 2015-01-15T15:51:37Z

Also confirmed for 1.8.2-pre2. I stil don't get it why fast chunk loading has basically been reverted to old behaviour. It makes higher view distances (> 16) basically useless.

Vladislav 2015-01-15T18:35:27Z

Still in 1.8.2-pre3.

kumasasa 2015-01-15T19:19:07Z

@unknown in http://www.reddit.com/r/Minecraft/comments/2sirzn/searge_on_twitter_minecraft_182pre2_is_now/cnq14ox

The server has been creating chunks at the same pace as ever. We're uploading less chunks to the videocard at every frame to spare older systems from getting major loading fps dips. Downside is that things now load a bit slower if you have a massively fast system. Removing Vsync and using a high fps limit (higher than 60) should make loading 'fast like before' if you have a system that handles it.

wobst.michael 2015-01-15T19:26:14Z

http://www.reddit.com/r/Minecraft/comments/2sirzn/searge_on_twitter_minecraft_182pre2_is_now/cnq14ox

"Removing Vsync and using a high fps limit (higher than 60) should make loading 'fast like before' if you have a system that handles it."

It definitely does not. It does improve it a bit, but does not restore old behaviour which was superfast.
--------------

If this is "Works as intended" then this is a real big drawback.

Andrés del Campo Novales 2015-01-15T19:33:58Z

Even with unlimited fps and vsync off, the performance of 1.8.1 is just not achieved in 1.8.2 pre1,2,3 by far. I think this is still a valid bug...

Andrés del Campo Novales 2015-01-15T19:56:09Z

Actually, could it be reverted as it was in 1.8 / 1.8.1, at least for single player? Or if needed for slower systems, have it as optional? It is a real drawback for high end systems at least. Thanks / Hugs

Vladislav 2015-01-16T12:36:24Z

Well, removing VSync and using unlimited fps will make it slightly faster, but not fast like before.

Erik Broes 2015-01-16T14:17:45Z

Correct and that is for now 'Working as Intended'

Andrés del Campo Novales 2015-01-17T00:50:55Z

That's really sad to hear. To give an idea, here are some improvised perf. measurements (loading 21 chunks render distance -same world position, several attempts averaged, VBO on, Vsync off, etc):

1.8: ............. 5 s
1.8.1: .......... 6 s
1.8.2pre4: ..12 s (!!!)

Worse if instead of limiting to 60fps I raise to unlimited frames, instead of going faster i found this:

1.8: ................ 6 s
1.8.1: ............. 7 s
1.8.2pre4: ... 27 s (!!!)

So 1.8.2 seems to be having only 30-40% of the speed of 1.8 loading chunks.

Chunk loading was really amazing in 1.8 and may people praised it. To many of us (mostly single players), good/reliable chunk loading has always been the top feature request, which was fully realized in 1.8, finally surpassing 1.2.5 and even solving other long term rendering issues.

All those would be very disappointed if the loading speed drops so much. It is hard to see this go so shortly after finally having it at its best ever in 1.8, and would discourage upgrading.

1.8.2 may be a number over 1.8.1, but it actually feels going backwards. I am sure you guys put a lot of effort on this, and I thank you for that. Just please do not lose sight of what many people want -something you already delivered before! Several weeks ago a little girl wrote a letter to Satya Nadella asking Mr Nadella to just keep Minecraft as it is. I/we just ask to keep what is good as it is, and if not possible for multiplayer, at least optional or for single player. Keep the greatest game the greatest. It doesn't deserve less.

Thank you.
P.S. let me know if I can help

Felipe González Martín 2015-01-17T18:36:37Z

In my case the world loads equal fast like in 1.8... And I've got a GT 720 and GT 720M.

Andrés del Campo Novales 2015-01-17T21:17:42Z

And in case it helps anyone while this gets fixed one way or another, at least for my system (high end, running in ram drive) the best fps value is limiting to 60. More fps or less fps end up loading chunks slower. I wonder if it has to do with matching the monitor refresh rate -vsync off anyway.

Vladislav 2015-02-06T16:20:27Z

Turn your clouds off (or fast), it greatly increases loading speed.

Andrés del Campo Novales 2015-02-06T19:04:00Z

Thanks for the hint Vladislav, it definitely seems to make a difference.

Furthermore... I have not measured it thoroughly, but 1.8.2pre6 significantly improves the rendering performance, almost back at the speed of 1.8.0!

Thanks Erik and team!!! 🙂