From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jacob <jacob@stellardev.org>
Date: Wed, 19 Jan 2022 16:55:38 -0700
Subject: [PATCH] Fast speed check

Original code by NFT-Worlds, licensed under GNU General Public License v3.0
You can find the original code on https://github.com/NFT-Worlds/Server

etil2jz's note:
NFT-Worlds is related to Stellar devs, known for countless paid forks mostly taking open source patches,
doing questionable/buggy ones, and claiming breathtaking performance improvements. Never ever pay for
any of those Spigot forks!

diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 6bc313aa05d572236f05d0960fde0f27b9f93d50..9bdcad2b05367a8dcb519a2db8c4efea94a4d21c 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1205,7 +1205,18 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
                 }
 
                 this.tryCheckInsideBlocks();
-                float f2 = this.getBlockSpeedFactor();
+                // NFT-Worlds start
+                float f2;
+                if (wtf.etil.mirai.MiraiConfig.fastSpeedCheck) {
+                    if (this.getDeltaMovement().x == 0 && this.getDeltaMovement().z == 0) {
+                        f2 = 1;
+                    } else {
+                        f2 = this.getBlockSpeedFactor();
+                    }
+                } else {
+                    f2 = this.getBlockSpeedFactor();
+                }
+                // NFT-Worlds stop
 
                 this.setDeltaMovement(this.getDeltaMovement().multiply((double) f2, 1.0D, (double) f2));
                 // Paper start - remove expensive streams from here
diff --git a/src/main/java/wtf/etil/mirai/MiraiConfig.java b/src/main/java/wtf/etil/mirai/MiraiConfig.java
index c12ab155bdd4a1bad7bb428ecddc20a7999f91f5..b9351994ac2b9865ca39fdb76625983cf7c63cdb 100644
--- a/src/main/java/wtf/etil/mirai/MiraiConfig.java
+++ b/src/main/java/wtf/etil/mirai/MiraiConfig.java
@@ -221,4 +221,11 @@ public class MiraiConfig {
                                         "Whether or not server should listen to location triggers.");
     }
 
+    public static boolean fastSpeedCheck;
+    private static void speedCheck() {
+        fastSpeedCheck = getBoolean("fast-speed-check", true,
+                            "Whether or not server should use a faster method",
+                            "to check when entity delta movement is null.");
+    }
+
 }
\ No newline at end of file