Small-x: QCD: the (improved) perturbative picture

After a brief introduction to low-x QCD and to resummation approaches, I illustrate the predictions for the gluon Green function and splitting function of a recent renormalization-group improved small-x resummation scheme. The perturbative high-energy exponents are predicted in a phenomenologically interesting range, and significant preasymptotic effects are found. In particular, the gluon splitting function shows a shallow dip in the moderate-x region, followed by the expected small-x power increase.