From f43543165be4aa3a0732bcbd01559bb21e1f72b1 Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Sun, 22 Feb 2015 06:19:33 +0100
Subject: [PATCH] cssnode: Add optimization

Don't even try to propagate changes when we know there are none.
---
 gtk/gtkcssnode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtk/gtkcssnode.c b/gtk/gtkcssnode.c
index cb2b43d62a..d6c2c40933 100644
--- a/gtk/gtkcssnode.c
+++ b/gtk/gtkcssnode.c
@@ -579,6 +579,9 @@ gtk_css_node_propagate_pending_changes (GtkCssNode *cssnode,
   if (style_changed)
     change |= GTK_CSS_CHANGE_PARENT_STYLE;
 
+  if (!cssnode->invalid && change == 0)
+    return;
+
   for (child = gtk_css_node_get_first_child (cssnode);
        child;
        child = gtk_css_node_get_next_sibling (child))