Don't send change notifications for unneeded properties

The backend doesn't need to know about the rotation angles used to
update the transform. Saves about 3% of time on the main thread
related to mallocing the property change notifications.

Change-Id: I784baf705cdd697ba860dc7a0c2e0e1c9ee467ec
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/manual/bigscene-cpp/entity.cpp b/tests/manual/bigscene-cpp/entity.cpp
index 9a4ecae3b..a4625a9b2 100644
--- a/tests/manual/bigscene-cpp/entity.cpp
+++ b/tests/manual/bigscene-cpp/entity.cpp
@@ -106,7 +106,9 @@ void Entity::setTheta(float theta)
         return;
 
     m_theta = theta;
+    const bool wasBlocked = blockNotifications(true);
     emit thetaChanged(theta);
+    blockNotifications(wasBlocked);
     updateTransform();
 }
 
@@ -116,7 +118,9 @@ void Entity::setPhi(float phi)
         return;
 
     m_phi = phi;
+    const bool wasBlocked = blockNotifications(true);
     emit phiChanged(phi);
+    blockNotifications(wasBlocked);
     updateTransform();
 }