From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paul Sauve <paul@technove.co>
Date: Sat, 13 Mar 2021 10:40:22 -0600
Subject: [PATCH] Reduce entity chunk ticking checks from 3 to 1


diff --git a/src/main/java/net/minecraft/server/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index ab1cf52d7faa93feba9dd2efd9479b2d72771778..e2bfb1423f6b24514cf7ea364be8bf5f554e0a5f 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -1083,11 +1083,12 @@ public class WorldServer extends World implements GeneratorAccessSeed {
                 // CraftBukkit end */
 
                 gameprofilerfiller.enter("checkDespawn");
+                boolean entityTickingChunk = false; if (!entity.dead) entityTickingChunk = this.getChunkProvider().isInEntityTickingChunk(entity); // Airplane - check once, chunks won't unload ticking entities
                 if (!entity.dead) {
                     entity.checkDespawn();
                     // Tuinity start - optimise notify()
                     if (entity.inChunk && entity.valid) {
-                        if (this.getChunkProvider().isInEntityTickingChunk(entity)) {
+                        if (entityTickingChunk) { // Airplane - reuse
                             this.updateNavigatorsInRegion(entity);
                         }
                     } else {
@@ -1117,7 +1118,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
                     this.entitiesById.remove(entity.getId()); // Tuinity
                     this.unregisterEntity(entity);
                 } else if (entity.inChunk && entity.valid) { // Tuinity start - optimise notify()
-                    if (this.getChunkProvider().isInEntityTickingChunk(entity)) {
+                    if (entityTickingChunk) { // Airplane - reuse
                         this.updateNavigatorsInRegion(entity);
                     }
                 } else {
@@ -1417,7 +1418,9 @@ public class WorldServer extends World implements GeneratorAccessSeed {
     }
     // Tuinity end - log detailed entity tick information
 
-    public void entityJoinedWorld(Entity entity) {
+    // Airplane start - reuse check for in entity ticking chunk
+    public void entityJoinedWorld(Entity entity) { entityJoinedWorld(entity, this.getChunkProvider().isInEntityTickingChunk(entity)); }
+    public void entityJoinedWorld(Entity entity, boolean entityTickingChunk) { // Airplane end
         // Tuinity start - log detailed entity tick information
         com.tuinity.tuinity.util.TickThread.ensureTickThread("Cannot tick an entity off-main");
         try {
@@ -1425,7 +1428,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
                 currentlyTickingEntity.lazySet(entity);
             }
             // Tuinity end - log detailed entity tick information
-        if (!(entity instanceof EntityHuman) && !this.getChunkProvider().a(entity)) {
+        if (!(entity instanceof EntityHuman) && !entityTickingChunk) { // Airplane - reuse
             this.chunkCheck(entity);
         } else {
             ++TimingHistory.entityTicks; // Paper - timings