From f2d79eee595a984bf6e5573a558b0735b0553b34 Mon Sep 17 00:00:00 2001
From: ts-korhonen <teemu.s.korhonen@gmail.com>
Date: Mon, 13 Dec 2021 18:02:22 +0200
Subject: [PATCH] Add thread yielding to qt main_thread that was omited.

---
 src/qt/qt_main.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/qt/qt_main.cpp b/src/qt/qt_main.cpp
index 7791029ce..5246dd3c5 100644
--- a/src/qt/qt_main.cpp
+++ b/src/qt/qt_main.cpp
@@ -71,8 +71,13 @@ main_thread_fn()
                 nvr_dosave = 0;
                 frames = 0;
             }
-        } else	/* Just so we dont overload the host OS. */
-            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+        } else {
+            /* Just so we dont overload the host OS. */
+            if (drawits < -1)
+                std::this_thread::sleep_for(std::chrono::milliseconds(1));
+            else
+                std::this_thread::yield();
+        }
 
         /* If needed, handle a screen resize. */
         if (doresize && !video_fullscreen && !is_quit) {