Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.
To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.
These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.
Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
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:
897a0a23 SPIGOT-5753: Back PotionType by a minecraft registry
255b2aa1 SPIGOT-7080: Add World#locateNearestBiome
ff984826 Remove javadoc.io doc links
CraftBukkit Changes:
71b0135cc SPIGOT-5753: Back PotionType by a minecraft registry
a6bcb8489 SPIGOT-7080: Add World#locateNearestBiome
ad0e57434 SPIGOT-7502: CraftMetaItem - cannot deserialize BlockStateTag
b3efca57a SPIGOT-6400: Use Mockito instead of InvocationHandler
38c599f9d PR-1272: Only allow one entity in CraftItem instead of two
f065271ac SPIGOT-7498: ChunkSnapshot.getBlockEmittedLight() gets 64 blocks upper in Overworld
Spigot Changes:
e0e223fe Remove javadoc.io doc links
