when the size of an edgehash is known or can be guessed,

pass in the argument to reserve the size.

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/mesh_validate.c b/source/blender/blenkernel/intern/mesh_validate.c
index 512f205728d..d42b6fd1bbd 100644
--- a/source/blender/blenkernel/intern/mesh_validate.c
+++ b/source/blender/blenkernel/intern/mesh_validate.c
@@ -921,7 +921,8 @@ void BKE_mesh_calc_edges(Mesh *mesh, bool update, const bool select)
 	EdgeHashIterator *ehi;
 	MPoly *mp;
 	MEdge *med, *med_orig;
-	EdgeHash *eh = BLI_edgehash_new(__func__);
+	EdgeHash *eh;
+	unsigned int eh_reserve;
 	int i, totedge, totpoly = mesh->totpoly;
 	int med_index;
 	/* select for newly created meshes which are selected [#25595] */
@@ -930,6 +931,9 @@ void BKE_mesh_calc_edges(Mesh *mesh, bool update, const bool select)
 	if (mesh->totedge == 0)
 		update = false;
 
+	eh_reserve = max_ii(update ? mesh->totedge : 0, BLI_EDGEHASH_SIZE_GUESS_FROM_POLYS(totpoly));
+	eh = BLI_edgehash_new_ex(__func__, eh_reserve);
+
 	if (update) {
 		/* assume existing edges are valid
 		 * useful when adding more faces and generating edges from them */