Patch documentation to come
Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.
The above list is not complete. The patch documentation will complete it.
New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.
Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.
The old legacy chunk system patches have been moved to the removed folder in case we need them again.
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
0a4b84d6 SPIGOT-7003: Add missing PlayerAnimationType
830db7d5 SPIGOT-5984: Add non deprecated / magic value way to set pixel in MapCanvas
20caf8ff PR-754: Add DamageCause.SONIC_BOOM
CraftBukkit Changes:
576a03704 SPIGOT-7003: Add missing PlayerAnimationType
0dcc5fdd0 SPIGOT-5984: Add non deprecated / magic value way to set pixel in MapCanvas
d75aacb43 Update Netty version
3b34c6bea SPIGOT-7044: Modified RandomSourceWrapper to ensure random is not null before setting seed
4b60bfd18 PR-1059: Add DamageCause.SONIC_BOOM
