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.

diff --git a/gtk/gtkcssstylechange.c b/gtk/gtkcssstylechange.c
index 50eac153e18c2a216968868898a78e4759aa5493..0ce6120f300479cd7c3bc967db564ca9283b0e04 100644 (file)
--- 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