  We use the divide-and-conquer and scanning algorithms for calculating
Khovanov cohomology directly on the Lee- or Bar-Natan deformations of the
Khovanov complex to give an alternative way to compute Rasmussen $s$-invariants
of knots. By disregarding generators away from homological degree 0 we can
considerably improve the efficiency of the algorithm. With a slight
modification we can also apply it to a refinement of Lipshitz-Sarkar.
