[vary printing speed within a print]

I´  d like to know if there is a option to vary the printing speed with in a print. 

I´  d to have the possibility to difine the printing speed in depending of the thincksness of the printed area.

For example, I have to print am big flat surface with a slim high wall at the end. 

Now I have to chose between high speed which results in a bad quality of the wall, or an awful long printing time.

Great would be an option to combine a certain thinkness with a certain printing speed.