[MC-155959] FPS drop when surpassing chunk boundaries while looking at leaves (with a low render distance)

When surpassing chunk boundaries with leaves in sight, you will experience a FPS drop proportional to how many leaves are in sight and how low the render distance is. This is a problem when exploring any biome containing trees while having a low render distance, or exploring jungles without low render distance. It is worse when exploring a jungle with low render distance, but this issue is also not restricted to naturally generated leaves. The resulting FPS drop could be reduced or stopped by pressing F3+A to reload chunks. Turning off biome blend does not affect this issue.

Related issues

relates to

MC-250246 Moving in mangrove swamps FPS/TPS drop below normal forests

MC-148095 Extreme FPS drop when moving in the biomes with lots of leaves

Attachments

Screen Shot 2019-07-03 at 10.19.36 PM.png

Screen Shot 2019-07-03 at 10.31.54 PM.png

Comments

migrated 2019-07-04T05:20:51Z

[media][media][media]

gaspoweredpick 2019-07-04T05:26:14Z

My screenshot was taken when I surpassed a chunk boundary multiple times, which helps demonstrate the extreme FPS drop.

I discovered this issue when testing if MC-125007 was affected by performance, and it was not.

migrated 2019-07-08T16:27:10Z

Can confirm on an Intel core i5-4570, 8 Gb RAM, Geforce GTX 1050 ti.

CubeTheThird 2019-07-18T13:58:14Z

Does this issue persist in the latest pre-release? (currently 1.14.4 pre 7)

gaspoweredpick 2019-07-19T00:09:38Z

Although leave performance has been improved, this specific issue is not fixed and the FPS drop from reproducing this is still very high.

migrated 2019-07-19T04:49:58Z

This issue is much worse when leaves are decaying.

wobst.michael 2019-11-10T12:05:15Z

Please check to what extend this applies to the latest 19w45b snapshot.

gaspoweredpick 2019-11-12T13:43:18Z

Still happens in 19w45b; It is still a little laggy when surpassing leaves with a low render distance, and frame drops are noticeable as well when moving through chunk borders while looking at the jungle with a normal render distance.

wobst.michael 2020-05-02T11:31:12Z

Can you still reproduce this in the latest snapshot?

migrated 2020-05-31T04:45:53Z

Relates to MC-186075

migrated 2021-05-30T18:02:50Z

Can confirm in 1.17-pre1.

[Mod] Jingy 2024-01-05T22:22:16Z

Can you still reproduce this in the latest version? I myself tried to in a single biome jungle world, but could not reproduce any noticable frame loss, and if I did, it was very slight and can be attributed to general world generation fps loss.
Are you able to add some steps to reproduce to the issue? Such as specific world generation settings to use, and any graphics settings required. Currently, I am unsure how to properly and fairly test it.

Minecraft386882 2024-11-11T06:16:54Z

Can confirm for 1.21.3