more performance improvements

src/c3nav/editor/api.py

@@ -60,14 +60,16 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
                 space_holes_geom = cascaded_union(holes)
                 holes_geom.append(space_holes_geom.intersection(space.geometry))
                 space.geometry = space.geometry.difference(space_holes_geom)
-        holes_geom = cascaded_union(holes_geom)
-        holes_geom_prep = prepared.prep(holes_geom)
 
         for building in buildings:
             building.original_geometry = building.geometry
-        for obj in buildings:
+
-            if holes_geom_prep.intersects(obj.geometry):
+        if holes_geom:
-                obj.geometry = obj.geometry.difference(holes_geom)
+            holes_geom = cascaded_union(holes_geom)
+            holes_geom_prep = prepared.prep(holes_geom)
+            for obj in buildings:
+                if holes_geom_prep.intersects(obj.geometry):
+                    obj.geometry = obj.geometry.difference(holes_geom)
 
         results = []
         results.extend(buildings)
@@ -106,6 +108,9 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
         Level = request.changeset.wrap_model('Level')
         Space = request.changeset.wrap_model('Space')
         Column = request.changeset.wrap_model('Column')
+        Hole = request.changeset.wrap_model('Hole')
+        AltitudeMarker = request.changeset.wrap_model('AltitudeMarker')
+        Building = request.changeset.wrap_model('Building')
         Door = request.changeset.wrap_model('Door')
         LocationGroup = request.changeset.wrap_model('LocationGroup')
 
@@ -129,13 +134,16 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
                 Prefetch('spaces', Space.objects.filter(Space.q_for_request(request)).only(
                     'geometry', 'level', 'outside'
                 )),
-                Prefetch('doors', Door.objects.filter(Door.q_for_request(request))),
+                Prefetch('doors', Door.objects.filter(Door.q_for_request(request)).only('geometry', 'level')),
-                Prefetch('spaces__columns', Column.objects.filter(Q(access_restriction__isnull=True) |
+                Prefetch('spaces__columns', Column.objects.filter(
-                                                                  ~Column.q_for_request(request))),
+                    Q(access_restriction__isnull=True) | ~Column.q_for_request(request)
+                ).only('geometry', 'space')),
                 Prefetch('spaces__groups', LocationGroup.objects.only(
                     'color', 'category', 'priority', 'category__priority', 'category__allow_spaces'
                 )),
-                'buildings', 'spaces__holes', 'spaces__altitudemarkers',
+                Prefetch('buildings', Building.objects.only('geometry', 'level')),
+                Prefetch('spaces__holes', Hole.objects.only('geometry', 'space')),
+                Prefetch('spaces__altitudemarkers', AltitudeMarker.objects.only('geometry', 'space')),
                 # Prefetch('spaces__graphnodes', graphnodes_qs)
             )
 
@@ -270,14 +278,14 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
                 other_spaces,
                 [space],
                 areas,
-                space.holes.all(),
+                space.holes.all().only('geometry', 'space'),
-                space.stairs.all(),
+                space.stairs.all().only('geometry', 'space'),
-                space.ramps.all(),
+                space.ramps.all().only('geometry', 'space'),
-                space.obstacles.all(),
+                space.obstacles.all().only('geometry', 'space'),
-                space.lineobstacles.all(),
+                space.lineobstacles.all().only('geometry', 'width', 'space'),
-                space.columns.all(),
+                space.columns.all().only('geometry', 'space'),
-                space.altitudemarkers.all(),
+                space.altitudemarkers.all().only('geometry', 'space'),
-                space.wifi_measurements.all().only('geometry'),
+                space.wifi_measurements.all().only('geometry', 'space'),
                 space.pois.filter(POI.q_for_request(request)).only('geometry', 'space').prefetch_related(
                     Prefetch('groups', LocationGroup.objects.only(
                         'color', 'category', 'priority', 'category__priority', 'category__allow_pois'

src/c3nav/mapdata/api.py

@@ -20,6 +20,7 @@ from rest_framework.viewsets import GenericViewSet, ReadOnlyModelViewSet, ViewSe
 
 from c3nav.mapdata.models import AccessRestriction, Building, Door, Hole, LocationGroup, MapUpdate, Source, Space
 from c3nav.mapdata.models.access import AccessPermission, AccessRestrictionGroup
+from c3nav.mapdata.models.geometry.base import GeometryMixin
 from c3nav.mapdata.models.geometry.level import LevelGeometryMixin
 from c3nav.mapdata.models.geometry.space import (POI, Area, Column, CrossDescription, LeaveDescription, LineObstacle,
                                                  Obstacle, Ramp, SpaceGeometryMixin, Stair)
@@ -67,7 +68,8 @@ def api_etag(permissions=True, etag_func=AccessPermission.etag_func, cache_param
                         response = Response(data)
 
                 if response is None:
-                    response = func(self, request, *args, **kwargs)
+                    with GeometryMixin.dont_keep_originals():
+                        response = func(self, request, *args, **kwargs)
                     if cache_parameters is not None and response.status_code == 200:
                         cache.set(cache_key, response.data, 300)
 

src/c3nav/mapdata/models/geometry/base.py

@@ -1,4 +1,5 @@
 import math
+from contextlib import contextmanager
 
 from django.db import models
 from django.utils.functional import cached_property
@@ -14,6 +15,8 @@ geometry_affecting_fields = ('height', 'width', 'access_restriction')
 
 
 class GeometryMixin(SerializableMixin):
+    no_orig = False
+
     """
     A map feature with a geometry
     """
@@ -25,11 +28,20 @@ class GeometryMixin(SerializableMixin):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.orig_geometry = None if 'geometry' in self.get_deferred_fields() else self.geometry
+        if not self.no_orig:
-        self._orig = {field.attname: (None if field.attname in self.get_deferred_fields()
+            self.orig_geometry = None if 'geometry' in self.get_deferred_fields() else self.geometry
-                                      else getattr(self, field.attname))
+            self._orig = {field.attname: (None if field.attname in self.get_deferred_fields()
-                      for field in self._meta.get_fields()
+                                          else getattr(self, field.attname))
-                      if field.name in geometry_affecting_fields}
+                          for field in self._meta.get_fields()
+                          if field.name in geometry_affecting_fields}
+
+    @classmethod
+    @contextmanager
+    def dont_keep_originals(cls):
+        # to do: invert this and to no_orig being True by default
+        cls.no_orig = True
+        yield
+        cls.no_orig = False
 
     def get_geojson_properties(self, *args, **kwargs) -> dict:
         result = {