1 files changed, 42 insertions, 0 deletions
diff --git a/patches/server/0267-Optimize-World-Time-Updates.patch b/patches/server/0267-Optimize-World-Time-Updates.patch
new file mode 100644
index 0000000000..4b1b035dfe
--- /dev/null
+++ b/patches/server/0267-Optimize-World-Time-Updates.patch
@@ -0,0 +1,42 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <[email protected]>
+Date: Fri, 2 Nov 2018 23:11:51 -0400
+Subject: [PATCH] Optimize World Time Updates
+
+Splits time updates into incremental updates as well as does
+the updates per world, so that we can re-use the same packet
+object for every player unless they have per-player time enabled.
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index 9477d6f850b112ff8e835ba5e80d56bc090f9c48..65e9ac5ba7237e97e286953568f28db86d244d1e 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -1538,12 +1538,24 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+ 
+         MinecraftTimings.timeUpdateTimer.startTiming(); // Spigot // Paper
+         // Send time updates to everyone, it will get the right time from the world the player is in.
+-        if (this.tickCount % 20 == 0) {
+-            for (int i = 0; i < this.getPlayerList().players.size(); ++i) {
+-                ServerPlayer entityplayer = (ServerPlayer) this.getPlayerList().players.get(i);
+-                entityplayer.connection.send(new ClientboundSetTimePacket(entityplayer.level().getGameTime(), entityplayer.getPlayerTime(), entityplayer.level().getGameRules().getBoolean(GameRules.RULE_DAYLIGHT))); // Add support for per player time
++        // Paper start - Perf: Optimize time updates
++        for (final ServerLevel level : this.getAllLevels()) {
++            final boolean doDaylight = level.getGameRules().getBoolean(GameRules.RULE_DAYLIGHT);
++            final long dayTime = level.getDayTime();
++            long worldTime = level.getGameTime();
++            final ClientboundSetTimePacket worldPacket = new ClientboundSetTimePacket(worldTime, dayTime, doDaylight);
++            for (Player entityhuman : level.players()) {
++                if (!(entityhuman instanceof ServerPlayer) || (tickCount + entityhuman.getId()) % 20 != 0) {
++                    continue;
++                }
++                ServerPlayer entityplayer = (ServerPlayer) entityhuman;
++                long playerTime = entityplayer.getPlayerTime();
++                ClientboundSetTimePacket packet = (playerTime == dayTime) ? worldPacket :
++                    new ClientboundSetTimePacket(worldTime, playerTime, doDaylight);
++                entityplayer.connection.send(packet); // Add support for per player time
+             }
+         }
++        // Paper end - Perf: Optimize time updates
+         MinecraftTimings.timeUpdateTimer.stopTiming(); // Spigot // Paper
+ 
+         while (iterator.hasNext()) {