Considering the Cobb-Douglas Model: GDP = A x (K^0,3 x L^0,7)
where
GDP = Gross Domestic Product
A = Total-factor Productivity
K = Capital stock
L = Labor share
It´s clear that if "A" (productivity) goes up, it impacts all the production factors directly. Otherwise, if "A" goes down, the conversion share from efforts to GDP goes down.
So, growth in productivity is more efficient than the growth of production factors directly, in terms of "conversion" of efforts into GDP.