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Hello @Matthias, I've been working on a DRC deck for skywater pdk, it could be found here. We had an issue that the li1 spacing check (li.3) was too slow when used with deep mode, so we thought of tiling it, but then we found out that we could change the polygons to edges and not do any tiling, and it would make the spacing check much faster. We were wondering if there's an explanation for the performance improvement after changing the shape? Also, we found out that when we changed the shape to edges and there's an error in the outside routing of a sub-circuit repeated multiple times, it's going to flag it once, but when used with polygon shapes it's going to flag it multiple times.