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Speed was a worrisome issue, for multi-knot-point warps in particular. The calculation of a Green's function output for some given knot-points was not the real culprit. It was not the centre of slowness of propagation. It was its application to an image which is followed by Eigen-analysis7.16 which made the approach altogether slow. Ways were needed to be discovered to eliminate this as an issue. Some of the following solutions are inter-related to speed.