Paper/patches/unapplied/server/0669-Optimize-entity-tracker-passenger-checks.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sun, 8 Aug 2021 00:52:54 -0400
Subject: [PATCH] Optimize entity tracker passenger checks


diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
index 4ebe6bdc01b2d80fc84ba31aae9eb9ac26339436..2869eef4eca2ecc83aedb39f46b97ebcda1f9242 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -75,7 +75,7 @@ public class ServerEntity {
         this.trackedPlayers = trackedPlayers;
         // CraftBukkit end
         this.ap = Vec3.ZERO;
-        this.lastPassengers = Collections.emptyList();
+        this.lastPassengers = com.google.common.collect.ImmutableList.of(); // Paper - optimize passenger checks
         this.level = worldserver;
         this.broadcast = consumer;
         this.entity = entity;