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c5a10665b8
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.
48 lines
2.8 KiB
Diff
48 lines
2.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Thu, 9 Apr 2020 21:20:33 -0400
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Subject: [PATCH] Don't move existing players to world spawn
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This can cause a nasty server lag the spawn chunks are not kept loaded
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or they aren't finished loading yet, or if the world spawn radius is
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larger than the keep loaded range.
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By skipping this, we avoid potential for a large spike on server start.
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== AT ==
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public net.minecraft.server.level.ServerPlayer fudgeSpawnLocation(Lnet/minecraft/server/level/ServerLevel;)V
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index 47982f87ce93658c73ee3d7a5f7dd680e2f9aa36..f8d4bd18f98ed914e116d0cc4a80140e4e8d759f 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -358,7 +358,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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this.server = server;
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this.stats = server.getPlayerList().getPlayerStats(this);
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this.advancements = server.getPlayerList().getPlayerAdvancements(this);
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- this.moveTo(this.adjustSpawnLocation(world, world.getSharedSpawnPos()).getBottomCenter(), 0.0F, 0.0F);
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+ // this.moveTo(this.adjustSpawnLocation(world, world.getSharedSpawnPos()).getBottomCenter(), 0.0F, 0.0F); // Paper - Don't move existing players to world spawn
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this.updateOptions(clientOptions);
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this.object = null;
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@@ -628,7 +628,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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position = Vec3.atCenterOf(world.getSharedSpawnPos());
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}
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this.setLevel(world);
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- this.setPos(position);
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+ this.setPosRaw(position.x(), position.y(), position.z()); // Paper - don't register to chunks yet
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}
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this.gameMode.setLevel((ServerLevel) world);
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}
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diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index 8cd80ea83ddcfd5052c8d8c19d3edb42538d1e15..2cbdcdf0349e7efa797802d0d339d158153690af 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -226,6 +226,7 @@ public abstract class PlayerList {
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// Paper start - Entity#getEntitySpawnReason
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if (optional.isEmpty()) {
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player.spawnReason = org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.DEFAULT; // set Player SpawnReason to DEFAULT on first login
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+ player.moveTo(player.adjustSpawnLocation(worldserver1, worldserver1.getSharedSpawnPos()).getBottomCenter(), 0.0F, 0.0F);
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}
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// Paper end - Entity#getEntitySpawnReason
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player.setServerLevel(worldserver1);
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