From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 16 May 2016 20:47:41 -0400
Subject: [PATCH] Async GameProfileCache saving


diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index fe59a95cf4f9750ce6ea8bbc98622ee42e37148a..23bf747bf268bd1100d8eadb81751ce72ef927ed 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1014,7 +1014,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
         } catch (java.lang.InterruptedException ignored) {} // Paper
         if (org.spigotmc.SpigotConfig.saveUserCacheOnStopOnly) {
             MinecraftServer.LOGGER.info("Saving usercache.json");
-            this.getProfileCache().save();
+            this.getProfileCache().save(false); // Paper - Perf: Async GameProfileCache saving
         }
         // Spigot end
 
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 8c1442f24a195e78500ad658828982bf2767aebc..07969f82a3df1b71bee275a99ef9170a4f9bbbb0 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -269,7 +269,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
         }
 
         if (this.convertOldUsers()) {
-            this.getProfileCache().save();
+            this.getProfileCache().save(false); // Paper - Perf: Async GameProfileCache saving
         }
 
         if (!OldUsersConverter.serverReadyAfterUserconversion(this)) {
diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
index a50b72ed08d16cdce19ff01512353412df2ee5ae..197e2ec9f1445a8184d0dde0e9b02b39e3302b91 100644
--- a/src/main/java/net/minecraft/server/players/GameProfileCache.java
+++ b/src/main/java/net/minecraft/server/players/GameProfileCache.java
@@ -117,7 +117,7 @@ public class GameProfileCache {
         GameProfileCache.GameProfileInfo usercache_usercacheentry = new GameProfileCache.GameProfileInfo(profile, date);
 
         this.safeAdd(usercache_usercacheentry);
-        if( !org.spigotmc.SpigotConfig.saveUserCacheOnStopOnly ) this.save(); // Spigot - skip saving if disabled
+        if( !org.spigotmc.SpigotConfig.saveUserCacheOnStopOnly ) this.save(true); // Spigot - skip saving if disabled // Paper - Perf: Async GameProfileCache saving
     }
 
     private long getNextOperation() {
@@ -150,7 +150,7 @@ public class GameProfileCache {
         }
 
         if (flag && !org.spigotmc.SpigotConfig.saveUserCacheOnStopOnly) { // Spigot - skip saving if disabled
-            this.save();
+            this.save(true); // Paper - Perf: Async GameProfileCache saving
         }
 
         return optional;
@@ -262,7 +262,7 @@ public class GameProfileCache {
         return list;
     }
 
-    public void save() {
+    public void save(boolean asyncSave) { // Paper - Perf: Async GameProfileCache saving
         JsonArray jsonarray = new JsonArray();
         DateFormat dateformat = GameProfileCache.createDateFormat();
 
@@ -270,6 +270,7 @@ public class GameProfileCache {
             jsonarray.add(GameProfileCache.writeGameProfile(usercache_usercacheentry, dateformat));
         });
         String s = this.gson.toJson(jsonarray);
+        Runnable save = () -> { // Paper - Perf: Async GameProfileCache saving
 
         try {
             BufferedWriter bufferedwriter = Files.newWriter(this.file, StandardCharsets.UTF_8);
@@ -294,6 +295,14 @@ public class GameProfileCache {
         } catch (IOException ioexception) {
             ;
         }
+        // Paper start - Perf: Async GameProfileCache saving
+        };
+        if (asyncSave) {
+            io.papermc.paper.util.MCUtil.scheduleAsyncTask(save);
+        } else {
+            save.run();
+        }
+        // Paper end - Perf: Async GameProfileCache saving
 
     }