I am rendering a simple 2D animation. As you can see in the image below, each frame consists of a white background with black circles moving over it. Right now I'm coloring the circles using "Principled BSDF" and the white background using "Emission". It looks nice but it takes several seconds to render each frame, which I think it's way too much for such a simple image (I'm not working in a slow machine).
Is there a different material (or technique) I can use to create this simple image, but using less time to render?