From 07288d20875dbcb8417a33fb67082905e4b99065 Mon Sep 17 00:00:00 2001
From: Nikita Tsukanov <keks9n@gmail.com>
Date: Sat, 2 May 2020 19:55:41 +0300
Subject: [PATCH] Reduce allocations

---
 src/Avalonia.Visuals/Rendering/DeferredRenderer.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs b/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
index b89649d591..ccb889ece9 100644
--- a/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
+++ b/src/Avalonia.Visuals/Rendering/DeferredRenderer.cs
@@ -35,6 +35,7 @@ namespace Avalonia.Rendering
         private IRef<IDrawOperation> _currentDraw;
         private readonly IDeferredRendererLock _lock;
         private readonly object _sceneLock = new object();
+        private readonly Action _updateSceneIfNeededDelegate;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="DeferredRenderer"/> class.
@@ -59,6 +60,7 @@ namespace Avalonia.Rendering
             Layers = new RenderLayers();
             _renderLoop = renderLoop;
             _lock = rendererLock ?? new ManagedDeferredRendererLock();
+            _updateSceneIfNeededDelegate = UpdateSceneIfNeeded;
         }
 
         /// <summary>
@@ -336,7 +338,7 @@ namespace Avalonia.Rendering
                     // So we are scheduling an update call so UI thread could prepare a scene before
                     // the next render timer tick
                     if (!recursiveCall && !isUiThread)
-                        Dispatcher.UIThread.InvokeAsync(UpdateSceneIfNeeded, DispatcherPriority.Render);
+                        Dispatcher.UIThread.Post(_updateSceneIfNeededDelegate, DispatcherPriority.Render);
 
                     // Indicate that we have updated the layers
                     return (sceneRef.Clone(), true);