As you have seen in previous posts from +Konstantin Dmitriev
regarding to rendering #optimization
there has been a significative improvement of the render speed in the current "Cobra" render system.
I want to mention that the structure that holds the new rendering engine is by far not completed or optimized and that there are more room for optimization in that great rendering engine. Also I want to mention that the rendering engine structure has been created with the optimization in mind and it has been created in a very professional and intelligent way.
Said this it is important to notice that it has been obtained in so few time (about two months) and with the resource of one single person.
It is worth
to continue supporting that development by the help of you, dear user of Synfig Studio.