when using extended world heights the game is bit jumpy no idea why.
i have added the pack i made to test the min needed to remake the bug
it is saying this in log Can't keep up! Is the server overloaded? Running 2008ms or 40 ticks behind
the time and ticks vary
the pig picture is a device to see the lag staying still and the pig bit is me just messing around its not needed
the clock and piston stops when the game lags
do it now in no datapacks cant previde metrics as it cant work due to bug with f3
Environment
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51 64-Bit (mixed mode)
Memory: 1000 MB - 2048 MB
CPUs: 8
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Datapack: CavesAndCliffsPreview
note in 21w19a its java 16
I5 cpu
Attachments
Comments 7
Can you try with a more recent version of Java? I believe the java 1.8 garbage collection is relatively slow in comparison to newer versions. You can read a bit more in this reddit post
I honestly hope Mojang uses their extended 1.18 deadline to revamp chunk loading, so it includes vertical chunk loading. I'd assume the lack of that is the main issue as the game now needs to deal with basically an extra half a world added onto itself.