From 1c3d775d9062f4bf204286bd1b19762bec0ad86e Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sun, 26 Feb 2023 17:44:45 -0800
Subject: [PATCH] apprt/embedded: ignore size callbacks that change nothing

---
 src/apprt/embedded.zig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/apprt/embedded.zig b/src/apprt/embedded.zig
index 8db67b0a1..0a21504e7 100644
--- a/src/apprt/embedded.zig
+++ b/src/apprt/embedded.zig
@@ -206,6 +206,12 @@ pub const Surface = struct {
     }
 
     pub fn updateSize(self: *Surface, width: u32, height: u32) void {
+        // Runtimes sometimes generate superflous resize events even
+        // if the size did not actually change (SwiftUI). We check
+        // that the size actually changed from what we last recorded
+        // since resizes are expensive.
+        if (self.size.width == width and self.size.height == height) return;
+
         self.size = .{
             .width = width,
             .height = height,