execute a pose in moveit too slow

I have a manipulator 6 DOF I can send it a pose with position and orientation and I set up a simple GUI using tkinter to publish the pose data for moveit to execute on RVIz. It pretty slower than what I expect I want it to be realtime but it take a period time about 6-7 second for every execution for 0.01 position to the next time press the button on GUI. Does anyone know how to make it better to get it realtime thanks in advance