From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: nostalgic853 <yuu8583@proton.me>
Date: Sat, 22 Oct 2022 09:58:38 +0800
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

This patch was took from Mirai. (https://github.com/etil2jz/Mirai)

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 64b91d72fca05f2e74bcaf83bccf061a25a0c868..b0bb07c57e6219a21003bfce72b6909680ac78e5 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1163,7 +1163,14 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
                 }
 
                 this.tryCheckInsideBlocks();
-                float f2 = this.getBlockSpeedFactor();
+                // KeYi start - Fast speed check
+                float f2;
+                if (this.getDeltaMovement().x == 0 && this.getDeltaMovement().z == 0) {
+                    f2 = 1;
+                } else {
+                    f2 = this.getBlockSpeedFactor();
+                }
+                // KeYi end
 
                 this.setDeltaMovement(this.getDeltaMovement().multiply((double) f2, 1.0D, (double) f2));
                 // Paper start - remove expensive streams from here