Wu Fast Form.
I have no experience with Ma's branch of the Wu style. In his branch, apparently the fast form is taught as a separate form. In the branches I'm familiar with, the round form may be practiced as a fast form.
Ten thousand flowers in spring, the moon in autumn, a cool breeze in summer, snow in winter. If your mind isn't clouded by unnecessary things, this is the best season of your life.
~ Wu-men ~