DivineMC/divinemc-server/minecraft-patches/features/0046-Player-ProfileResult-caching.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
Date: Sat, 26 Apr 2025 22:30:35 +0300
Subject: [PATCH] Player ProfileResult caching


diff --git a/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 738c8749593cf3c30a1c321664abf12ba8dac635..7dbd73d8b5f5d2888cede36f9ea0d0cf71b4a49d 100644
--- a/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -74,6 +74,11 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
     private net.minecraft.server.level.ServerPlayer player; // CraftBukkit
     public boolean iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation = false; // Paper - username validation overriding
     private int velocityLoginMessageId = -1; // Paper - Add Velocity IP Forwarding Support
+    // DivineMC start - Player ProfileResult caching
+    private static final com.google.common.cache.Cache<String, ProfileResult> playerProfileResultCache = com.google.common.cache.CacheBuilder.newBuilder()
+        .expireAfterWrite(1, java.util.concurrent.TimeUnit.MINUTES)
+        .build();
+    // DivineMC end - Player ProfileResult caching
 
     public ServerLoginPacketListenerImpl(MinecraftServer server, Connection connection, boolean transferred) {
         this.server = server;
@@ -293,9 +298,23 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
                 String string1 = Objects.requireNonNull(ServerLoginPacketListenerImpl.this.requestedUsername, "Player name not initialized");
 
                 try {
-                    ProfileResult profileResult = ServerLoginPacketListenerImpl.this.server
-                        .getSessionService()
-                        .hasJoinedServer(string1, string, this.getAddress());
+                    // DivineMC start - Player ProfileResult caching
+                    ProfileResult profileResult;
+                    if (org.bxteam.divinemc.DivineConfig.playerProfileResultCachingEnabled) {
+                        profileResult = playerProfileResultCache.getIfPresent(string1);
+
+                        if (profileResult == null) {
+                            profileResult = ServerLoginPacketListenerImpl.this.server
+                                .getSessionService()
+                                .hasJoinedServer(string1, string, this.getAddress());
+                            playerProfileResultCache.put(string1, profileResult);
+                        }
+                    } else {
+                        profileResult = ServerLoginPacketListenerImpl.this.server
+                            .getSessionService()
+                            .hasJoinedServer(string1, string, this.getAddress());
+                    }
+                    // DivineMC end - Player ProfileResult caching
                     if (profileResult != null) {
                         GameProfile gameProfile = profileResult.profile();
                         // CraftBukkit start - fire PlayerPreLoginEvent