From 6e6cbd7316032a7fe23f8f1c4edf4ca0a5d9280b Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Sat, 16 Jan 2016 23:15:11 +0100
Subject: [PATCH] stylechange: Do the right thing when old and new style are
 equal

We don't need to compare all their CSS values to figure out that nothing
changed. We know that.
---
 gtk/gtkcssstylechange.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gtk/gtkcssstylechange.c b/gtk/gtkcssstylechange.c
index 50eac153e1..0ce6120f30 100644
--- a/gtk/gtkcssstylechange.c
+++ b/gtk/gtkcssstylechange.c
@@ -33,6 +33,10 @@ gtk_css_style_change_init (GtkCssStyleChange *change,
 
   change->affects = 0;
   change->changes = _gtk_bitmask_new ();
+  
+  /* Make sure we don't do extra work if old and new are equal. */
+  if (old_style == new_style)
+    change->n_compared = GTK_CSS_PROPERTY_N_PROPERTIES;
 }
 
 void