diff --git a/network_process/src/prim_gen/extract_mesh.cpp b/network_process/src/prim_gen/extract_mesh.cpp
index 3425a51..37bf55f 100644
--- a/network_process/src/prim_gen/extract_mesh.cpp
+++ b/network_process/src/prim_gen/extract_mesh.cpp
@@ -195,7 +195,7 @@ void extract_iso_mesh(const std::array<uint32_t, 3>&                tet_active_s
             const auto& face = faces[face_index];
             face_verts.clear();
 
-            for (unsigned long vId : face.vertices) { face_verts.emplace_back(iso_vId_of_vert[vId]); }
+            for (unsigned long vId : face.vertices) face_verts.emplace_back(iso_vId_of_vert[vId]);
             const face_header_t face_header{tet_index, face_index};
             // face is on tet boundary if face.negative_cell is NONE
             uint32_t            iso_face_index{static_cast<uint32_t>(iso_faces.size())};
@@ -216,4 +216,8 @@ void extract_iso_mesh(const std::array<uint32_t, 3>&                tet_active_s
             iso_faces[iso_face_index].headers.emplace_back(face_header);
         }
     }
+
+    iso_pts.shrink_to_fit();
+    iso_verts.shrink_to_fit();
+    iso_faces.shrink_to_fit();
 }
\ No newline at end of file