slow texture paint

hi everyone.
i’m makeing a complicated texture for a character and i can’t get it right when i can only see the UV map and i would rather paint directly onto the model which i’m guessing was the point of texture paint mode. but it’s incredably slow. i have turned of (or made invisable realy) all modfyers but it’s still realy slow. how can i speed it up enough to work in texture paint mode and paint directly onto the model?