From 5edf2d2395508e856a420f7fe9bc7ad85a2aba11 Mon Sep 17 00:00:00 2001
From: davier <bricedavier@gmail.com>
Date: Mon, 25 Jan 2021 05:00:20 +0000
Subject: [PATCH] Prevent ImageBundles from causing constant layout
 recalculations (#1299)

Prevent ImageBundles from causing constant layout recalculations
---
 crates/bevy_ui/src/widget/image.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/bevy_ui/src/widget/image.rs b/crates/bevy_ui/src/widget/image.rs
index 051a38769f3ca..14a84484fb18b 100644
--- a/crates/bevy_ui/src/widget/image.rs
+++ b/crates/bevy_ui/src/widget/image.rs
@@ -27,10 +27,14 @@ pub fn image_node_system(
             .and_then(|material| material.texture.as_ref())
             .and_then(|texture_handle| textures.get(texture_handle))
         {
-            calculated_size.size = Size {
+            let size = Size {
                 width: texture.size.width as f32,
                 height: texture.size.height as f32,
             };
+            // Update only if size has changed to avoid needless layout calculations
+            if size != calculated_size.size {
+                calculated_size.size = size;
+            }
         }
     }
 }