From 204f3e48edda63ea214142dc84aada9be4727146 Mon Sep 17 00:00:00 2001
From: Will McGugan <willmcgugan@gmail.com>
Date: Sun, 8 Jan 2023 22:32:09 +0000
Subject: [PATCH] optimization

---
 src/textual/_compositor.py |  5 ++++-
 src/textual/geometry.py    | 12 ++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/textual/_compositor.py b/src/textual/_compositor.py
index e7d436add..163ce7665 100644
--- a/src/textual/_compositor.py
+++ b/src/textual/_compositor.py
@@ -276,7 +276,10 @@ class Compositor:
         resized_widgets = {
             widget
             for widget, (region, *_) in changes
-            if widget in common_widgets and old_map[widget].region.size != region.size
+            if (
+                widget in common_widgets
+                and not old_map[widget].region.same_size(region)
+            )
         }
 
         screen_region = size.region
diff --git a/src/textual/geometry.py b/src/textual/geometry.py
index 17e938b1d..9990a9cdb 100644
--- a/src/textual/geometry.py
+++ b/src/textual/geometry.py
@@ -541,6 +541,18 @@ class Region(NamedTuple):
         width2, height2 = size
         return Region(x, y, min(width1, width2), min(height1, height2))
 
+    def same_size(self, region: Region) -> bool:
+        """Check if another region is the same size. Equivalent to `self.size == region.size`,
+        but a little faster.
+
+        Args:
+            region (Region): A region.
+
+        Returns:
+            bool: True if both regions are the same size, False if they are different sizes.
+        """
+        return self[2:] == region[2:]
+
     def expand(self, size: tuple[int, int]) -> Region:
         """Increase the size of the region by adding a border.