diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 687fa35fd82..e4c0adcc24e 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -1241,10 +1241,12 @@ static void make_edges_mdata_extend(MEdge **r_alledge, int *r_totedge,
 	int totedge = *r_totedge;
 	int totedge_new;
 	EdgeHash *eh;
+	unsigned int eh_reserve;
 	const MPoly *mp;
 	int i;
 
-	eh = BLI_edgehash_new(__func__);
+	eh_reserve = max_ii(totedge, BLI_EDGEHASH_SIZE_GUESS_FROM_POLYS(totpoly));
+	eh = BLI_edgehash_new_ex(__func__, eh_reserve);
 
 	for (i = 0, mp = mpoly; i < totpoly; i++, mp++) {
 		BKE_mesh_poly_edgehash_insert(eh, mp, mloop + mp->loopstart);
@@ -2308,7 +2310,7 @@ void BKE_mesh_convert_mfaces_to_mpolys_ex(ID *id, CustomData *fdata, CustomData
 		CustomData_external_read(fdata, id, CD_MASK_MDISPS, totface_i);
 	}
 
-	eh = BLI_edgehash_new(__func__);
+	eh = BLI_edgehash_new_ex(__func__, totedge_i);
 
 	/* build edge hash */
 	me = medge;
diff --git a/source/blender/blenkernel/intern/mesh_validate.c b/source/blender/blenkernel/intern/mesh_validate.c
index d42b6fd1bbd..294e3bf3e55 100644
--- a/source/blender/blenkernel/intern/mesh_validate.c
+++ b/source/blender/blenkernel/intern/mesh_validate.c
@@ -216,7 +216,7 @@ int BKE_mesh_validate_arrays(Mesh *mesh,
 
 	bool do_edge_recalc = false;
 
-	EdgeHash *edge_hash = BLI_edgehash_new(__func__);
+	EdgeHash *edge_hash = BLI_edgehash_new_ex(__func__, totedge);
 
 	BLI_assert(!(do_fixes && mesh == NULL));
 
diff --git a/source/blender/blenkernel/intern/subsurf_ccg.c b/source/blender/blenkernel/intern/subsurf_ccg.c
index 0bb27e64c4b..21bcf328317 100644
--- a/source/blender/blenkernel/intern/subsurf_ccg.c
+++ b/source/blender/blenkernel/intern/subsurf_ccg.c
@@ -1332,7 +1332,7 @@ static void ccgDM_copyFinalLoopArray(DerivedMesh *dm, MLoop *mloop)
 	if (!ccgdm->ehash) {
 		MEdge *medge;
 
-		ccgdm->ehash = BLI_edgehash_new(__func__);
+		ccgdm->ehash = BLI_edgehash_new_ex(__func__, ccgdm->dm.numEdgeData);
 		medge = ccgdm->dm.getEdgeArray((DerivedMesh *)ccgdm);
 
 		for (i = 0; i < ccgdm->dm.numEdgeData; i++) {