This patch provides an optimisation for Ease (Smoothstep) setting in the color ramp node. This optimisation exists already for Constant and Linear modes.
Based on a Twitter thread here from @Bartosz Moniewski (monio) and comment from @Clément Foucault (fclem) : https://twitter.com/hypersomniac_/status/1229133414789525504
@Bartosz Moniewski (monio) has tested the patch with the following observations.
I tested this Color Ramp smoothstep diff. LGTM. There are small differences when stop points are really close but acceptable imho.