From 33c61fdac5272f6f7912e9a39d8a10c4530ba8a5 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Wed, 8 Jun 2022 01:41:18 +0100
Subject: [PATCH] reduce work done on osx native side.

---
 .../Avalonia.Native/src/OSX/WindowBaseImpl.mm   | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
index 7f2bb128da..f133fa34f6 100644
--- a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
+++ b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
@@ -298,14 +298,15 @@ HRESULT WindowBaseImpl::Resize(double x, double y, AvnPlatformResizeReason reaso
         }
 
         @try {
-            lastSize = NSSize {x, y};
-
-            if (!_shown) {
-                BaseEvents->Resized(AvnSize{x, y}, reason);
-            }
-            else if(Window != nullptr) {
-                [Window setContentSize:lastSize];
-                [Window invalidateShadow];
+            if(x != lastSize.width || y != lastSize.height) {
+                lastSize = NSSize{x, y};
+
+                if (!_shown) {
+                    BaseEvents->Resized(AvnSize{x, y}, reason);
+                } else if (Window != nullptr) {
+                    [Window setContentSize:lastSize];
+                    [Window invalidateShadow];
+                }
             }
         }
         @finally {