PaperMC/Spigot-Server-Patches/0134-Provide-E-TE-Chunk-count-stat-methods.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 7 Jan 2017 15:24:46 -0500
Subject: [PATCH] Provide E/TE/Chunk count stat methods

Provides counts without the ineffeciency of using .getEntities().size()
which creates copy of the collections.

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 5c488c8a40c648c5c432d38d95d3e00fde2cdb75..642efd930dc6cfad1d9436df97f151ea69b24b0c 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -282,6 +282,48 @@ public class CraftWorld implements World {
     private int waterAmbientSpawn = -1;
     private int ambientSpawn = -1;
 
+    // Paper start - Provide fast information methods
+    public int getEntityCount() {
+        int ret = 0;
+        for (net.minecraft.world.entity.Entity entity : world.entitiesById.values()) {
+            if (entity.isChunkLoaded()) {
+                ++ret;
+            }
+        }
+        return ret;
+    }
+    public int getTileEntityCount() {
+        // We don't use the full world tile entity list, so we must iterate chunks
+        Long2ObjectLinkedOpenHashMap<PlayerChunk> chunks = world.getChunkProvider().playerChunkMap.visibleChunks;
+        int size = 0;
+        for (PlayerChunk playerchunk : chunks.values()) {
+            net.minecraft.world.level.chunk.Chunk chunk = playerchunk.getChunk();
+            if (chunk == null) {
+                continue;
+            }
+            size += chunk.tileEntities.size();
+        }
+        return size;
+    }
+    public int getTickableTileEntityCount() {
+        return world.tileEntityListTick.size();
+    }
+    public int getChunkCount() {
+        int ret = 0;
+
+        for (PlayerChunk chunkHolder : world.getChunkProvider().playerChunkMap.visibleChunks.values()) {
+            if (chunkHolder.getChunk() != null) {
+                ++ret;
+            }
+        }
+
+        return ret;
+    }
+    public int getPlayerCount() {
+        return world.players.size();
+    }
+    // Paper end
+
     private static final Random rand = new Random();
 
     public CraftWorld(WorldServer world, ChunkGenerator gen, Environment env) {