I am following the tutorials on the WGCNA website for creating a coexpression network. It is taking way too long. Is there a way to speed up execution? All I need is to create the co-expression graph. I will then export to Python and do my analysis there. In particular, the step "calculating module eigengenes" is taking a lot of time. I do not really care about the modules. All I want is the graph with the genes and the weighted edges.