Paper/Spigot-Server-Patches/0379-Performance-improvement-for-Chunk.getEntities.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: wea_ondara <wea_ondara@alpenblock.net>
Date: Thu, 10 Oct 2019 11:29:42 +0200
Subject: [PATCH] Performance improvement for Chunk.getEntities
This patch aims to reduce performance cost used by collecting the
entities of a chunk. Previously the entitySlices were copied into an
extra array with List.toArray() with is a costly and unneccessary
operation. This patch will reduce the load of plugins which for example
implement custom moblimits and depend on Chunk.getEntities().
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
index d40ef8353b2c025309144b4123d6a7dff04a9c62..26210b233bb40565326cf25f568dca0984ce7313 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
@@ -115,14 +115,14 @@ public class CraftChunk implements Chunk {
Entity[] entities = new Entity[count];
for (int i = 0; i < 16; i++) {
-
- for (Object obj : chunk.entitySlices[i].toArray()) {
- if (!(obj instanceof net.minecraft.server.Entity)) {
+ // Paper start - speed up (was with chunk.entitySlices[i].toArray() and cast checks which costs a lot of performance if called often)
+ for (net.minecraft.server.Entity entity : chunk.entitySlices[i]) {
+ if (entity == null) {
continue;
}
-
- entities[index++] = ((net.minecraft.server.Entity) obj).getBukkitEntity();
+ entities[index++] = entity.getBukkitEntity();
}
+ // Paper end
}
return entities;