From 9b827c0436381cdae815b520ab920f70e299e397 Mon Sep 17 00:00:00 2001
From: Louis Gombert <44813937+Lgt2x@users.noreply.github.com>
Date: Sat, 20 Dec 2025 22:23:55 +0100
Subject: [PATCH] SVG export: improve performance (#26149)

* SVG export: use a set to match edges instead of a list

Lookup in edge list becomes O(1), significantly improving SVG export speed

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 src/Mod/Draft/draftfunctions/svg.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Draft/draftfunctions/svg.py b/src/Mod/Draft/draftfunctions/svg.py
index 875583e5d5..c6130c6b8e 100644
--- a/src/Mod/Draft/draftfunctions/svg.py
+++ b/src/Mod/Draft/draftfunctions/svg.py
@@ -1052,10 +1052,20 @@ def get_svg(
                         pathname="%s_w%04d" % (obj.Name, i),
                     )
                     wiredEdges.extend(w.Edges)
+
             if len(wiredEdges) != len(obj.Shape.Edges):
                 fill = "none"  # Required if obj has a face. Edges processed here have no face.
+
+                def get_edge_descriptor(edge):
+                    return (
+                        str(edge.Curve),
+                        str(edge.Vertexes[0].Point),
+                        str(edge.Vertexes[-1].Point),
+                    )
+
+                wiredEdgesSet = set([get_edge_descriptor(e) for e in wiredEdges])
                 for i, e in enumerate(obj.Shape.Edges):
-                    if DraftGeomUtils.findEdge(e, wiredEdges) is None:
+                    if get_edge_descriptor(e) not in wiredEdgesSet:
                         svg += get_path(
                             obj,
                             plane,