[mutter/wip/carlosg/performance-improvements: 8/23] ClutterActor: Optimize away idempotent scale/position updates

[Carlos Garnacho <carlosg src gnome org>]

commit 213e88458b2c717b732de29a3f3b02b61c81521b
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Apr 30 18:29:19 2017 +0200

    ClutterActor: Optimize away idempotent scale/position updates
    
    If the actor results in the same scale/position, there's no need to
    trigger a transition.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782344

 clutter/clutter/clutter-actor.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/clutter/clutter/clutter-actor.c b/clutter/clutter/clutter-actor.c
index ff4237c..eec61da 100644
--- a/clutter/clutter/clutter-actor.c
+++ b/clutter/clutter/clutter-actor.c
@@ -4831,7 +4831,8 @@ clutter_actor_set_scale_factor (ClutterActor      *self,
   g_assert (pspec != NULL);
   g_assert (scale_p != NULL);
 
-  _clutter_actor_create_transition (self, pspec, *scale_p, factor);
+  if (*scale_p != factor)
+    _clutter_actor_create_transition (self, pspec, *scale_p, factor);
 }
 
 static inline void
@@ -10268,9 +10269,10 @@ clutter_actor_set_position (ClutterActor *self,
   cur_position.x = clutter_actor_get_x (self);
   cur_position.y = clutter_actor_get_y (self);
 
-  _clutter_actor_create_transition (self, obj_props[PROP_POSITION],
-                                    &cur_position,
-                                    &new_position);
+  if (!clutter_point_equals (&cur_position, &new_position))
+    _clutter_actor_create_transition (self, obj_props[PROP_POSITION],
+                                      &cur_position,
+                                      &new_position);
 }
 
 /**