Motion Blur Render Time I am rendering a pretty simple animation using Cycles. I render with my GPU, not CPU, and it's pretty nice. I have, however, encountered a problem.

If I turn on Motion Blur, frame takes half of forever to render and crashes my GPU. 

If I turn off Motion Blur render is really quick. Is there a way to make it render faster? I would prefer not to use compositor to add the motion blur.
Sorry but there's no way to make motion blur rendering in cycles any faster for now. how blender developers made motion blur 10x faster

As you can see in the article that they have already improved and sped up motion blur rendering by a lot. Compositing is your only choice left if you want it fast.