The background article by @rand is now online r7p5 | Builder-web visualizations at Robur
Some of the changes lead to a more coarse-grained overview (not on a function basis, but on a module / opam package basis) → less rectangles, but I suspect in certain scenarios you’d like to have fine-grained analysis. So maybe we should work on re-integrating our changes and provide a switch – whether coarse (&fast) or fine (&slow) is desired.