From 07b047012ab90dad9f2ae8825eaba646c893eaca Mon Sep 17 00:00:00 2001
From: Wei Chen <alanchenboy@gmail.com>
Date: Fri, 9 Dec 2022 18:08:50 +0800
Subject: [PATCH] [iOS]Fix map loading laggy on M1 simulator (#581)

Co-authored-by: wei chen <wei.chen@grabtaxi.com>
---
 platform/darwin/src/nsthread.mm | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/platform/darwin/src/nsthread.mm b/platform/darwin/src/nsthread.mm
index 9af9cf3cc..8a3ed1743 100644
--- a/platform/darwin/src/nsthread.mm
+++ b/platform/darwin/src/nsthread.mm
@@ -22,7 +22,7 @@ void setCurrentThreadName(const std::string& name) {
 }
 
 void makeThreadLowPriority() {
-    [[NSThread currentThread] setThreadPriority:0.0];
+    [NSThread currentThread].qualityOfService = NSQualityOfServiceUtility;
 }
 
 void setCurrentThreadPriority(double priority) {
@@ -30,8 +30,16 @@ void setCurrentThreadPriority(double priority) {
         Log::Warning(Event::General, "Invalid thread priority was provided");
         return;
     }
-
-    [[NSThread currentThread] setThreadPriority:priority];
+    
+    if (priority < 0.25) {
+        [NSThread currentThread].qualityOfService = NSQualityOfServiceBackground;
+    } else if (priority < 0.5) {
+        [NSThread currentThread].qualityOfService = NSQualityOfServiceUtility;
+    } else if (priority < 0.75) {
+        [NSThread currentThread].qualityOfService = NSQualityOfServiceUserInitiated;
+    } else {
+        [NSThread currentThread].qualityOfService = NSQualityOfServiceUserInteractive;
+    }
 }
 
 void attachThread() {