Drying cracks are opportunistic. They will initiate at sharp, convex angles. By doing this procedure after trimming you will deny a crack a place to start. Of course even drying is still important. In the pictures on the right, round-ended tools are being used to compress and round the angle at which the handle meets the wall of the mug.
During drying clays and porcelains shrink as they become rigid. When this occurs unevenly, cracks are the result.