From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=84=97=E3=84=A0=CB=8B=20=E3=84=91=E3=84=A7=CB=8A?=
 <tsao-chi@the-lingo.org>
Date: Thu, 5 Jan 2023 09:08:17 +0800
Subject: [PATCH] Akarin: Save Json list asynchronously

Original license: GPL v3
Original project: https://github.com/Akarin-project/Akarin

diff --git a/src/main/java/net/minecraft/server/players/StoredUserList.java b/src/main/java/net/minecraft/server/players/StoredUserList.java
index 97737da3c2f13e1bd29dc119133c7267f5d10117..6030e760c07cc90a06403a364d898a6259a40214 100644
--- a/src/main/java/net/minecraft/server/players/StoredUserList.java
+++ b/src/main/java/net/minecraft/server/players/StoredUserList.java
@@ -103,6 +103,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
     }
 
     public void save() throws IOException {
+        Runnable saveTask = () -> {// Leaf - Akarin - Save json list async
         this.removeExpired(); // Paper - remove expired values before saving
         JsonArray jsonarray = new JsonArray();
         Stream<JsonObject> stream = this.map.values().stream().map((jsonlistentry) -> { // CraftBukkit - decompile error
@@ -114,6 +115,8 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
 
         Objects.requireNonNull(jsonarray);
         stream.forEach(jsonarray::add);
+
+        try {// Leaf - Akarin - Save json list async
         BufferedWriter bufferedwriter = Files.newWriter(this.file, StandardCharsets.UTF_8);
 
         try {
@@ -134,6 +137,13 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
             bufferedwriter.close();
         }
 
+        // Leaf start - Akarin - Save json list async
+        } catch (Exception e) {
+            StoredUserList.LOGGER.warn("Failed to async save " + this.file, e);
+        }
+        };
+        io.papermc.paper.util.MCUtil.scheduleAsyncTask(saveTask);
+        // Leaf end - Akarin - Save json list async
     }
 
     public void load() throws IOException {