The bug
When walking into a new chunk, Minecraft lags for a single frame.
Video: https://streamable.com/z8c88
How to reproduce
Create a new empty world
F3 + G to view chunk boundaries
Walk into a new chunk
→ ❌ Notice brief fps drops
Linked issues
is duplicated by 12
MC-137540
Stutter Lag
Resolved
MC-137665
Significant lagspices while moving between chunks
Resolved
MC-137674
Small freezes during the generation of new chunks
Resolved
MC-137749
Lag spike when crossing between chunks.
Resolved
MC-137772
intense lag while trying to do anything
Resolved
MC-137788
Extremely Laggy
Resolved
MC-137816
Enormous, constant lag spikes
Resolved
MC-137981
Lag when crossing any chunk border
Resolved
MC-137992
Very big and consistant lag spikes
Resolved
MC-138023
Stuttering when walking through chunk borders.
Resolved
MC-138042
Freeze when player changes chunk
Resolved
MC-138147
When traveling through different chunks, there is still a lag spike, and you can see that when doing Alt+F3 and walking/flying through a different chunk.
Resolved
Attachments
Comments 22
Came here to report this. Can confirm this issue.
Confirming. I have not had a crash due to this issue, so no crash report to show? It's simply lag spikes when walking between chunks.
Similar here, use F3-G to confirm. Every time I cross from one chunk to another the game lags. It also depends on the chunk range. At 16 Chunks it's not quite as bad as say 28 chunks.
I can confirm
With F3 open, it looks like it's something to do with the "Server Light level" vs. "Client Light level". The "Server" line vanishes briefly when crossing the chunk as if the client is "wait-a-minute, let me talk with the server" even though I'm testing this in single player.
Can confirm, 18W43B. If I walk from one chunk to another, there's a very noticeable hesitation. If I walk back and forth between two chunks, there's the same hesitation each time I cross the chunk border.
Can confirm this on 18W43B in Single Player. Does not happen on my Snapshot Testing multiplayer server.
The pie profiler shows scheduledExecutables increasing at this time
I also noticed a very high number of mob on the map, as on the screenshot. But I don't now if it's a non-bug.
I also noticed this even while running a server on a 2nd PC, and also while just mining blocks in the same chunk, every single time you break a block, it stutters for a few seconds, I'm guessing its the new lighting engine, cause I see the same issue while just replacing the floor of a new house, every block I put down cause a slight freeze, I've tested this in the official 1.13.2 and I didn't see this problem at all.
Still an issue in 18w43c
I can confirm its still in 18w43c, I'm not surprised being one of the first released snapshot for this version, perhaps it was a little bit too early, I'm blaming the new lighting engine on this one, I see the same lag for each block I mine or I put down, so I suspect its the way the new lighting engine is calculating its way out.
Also can confirm, still happens on 18w43c. Is the stutter happening because the new chunk data is drawn all at once as soon as it's received by the client, and the chunks behind you that are despawning are being despawned all at the same time? If all of this is happening on the same tick, then maybe it should be spread across several ticks.
Can confirm this is still happening in 18w43c.
Edit: just to confirm that I agree with the person above me. The game tries to draw all the chunks at once as soon as I move to the next chunk, and I think that's part of the issue somehow.
Also can confirm in 18w43c. Reopening.
Seems to be fixed in 18w44a.
Seems to be fixed, I can confirm, but I see a little lag spike after chopping down a tree now, its not extreme, but I think its related to the leaves despawning mechanic, which is maybe a new bug report, I'll browse through the new ones tomorrow when I have more time, if its not there, I'll try to reproduce it again and report it.
I can also confirm that this is fixed. Wp devs
Before the fix, I had a lot of lag while walking between chunks. After the fix it's been a small inconsistent spike most times. My latency when crossing chunk boarders goes up to 100-120ms (again, not as bad as before the fix, but still noticeable). But for some reason, I only get the spike if I stay in the current chunk for a few seconds. Going back and forth between the boarder quickly doesn't give me any lag.
this 1.14 grid frame skip bug happened to me on the released version
is this fix ? i still have the bug on server on 1.16.1
Fry
Can confirm