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improve svg rendering performance using prefetch_related

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This commit is contained in:
Laura Klünder 2017-06-08 16:30:58 +02:00
parent bffc0f2191
commit eb7fa85a81
1 changed files with 5 additions and 3 deletions
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8
src/c3nav/mapdata/models/section.py
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@ -70,7 +70,8 @@ class Section(SpecificLocation, EditorFormMixin, models.Model):
building_geometries = cascaded_union(tuple(b.geometry for b in self.buildings.all()))
spaces = self.spaces.all()
spaces = self.spaces.all().prefetch_related('groups', 'holes', 'areas', 'areas__groups',
'stairs', 'obstacles', 'lineobstacles')
space_levels = {
'upper': [],
'lower': [],
@ -104,7 +105,8 @@ class Section(SpecificLocation, EditorFormMixin, models.Model):
self._render_space_inventory(svg, space)
# draw space background
door_geometries = cascaded_union(tuple(d.geometry for d in self.doors.all()))
doors = self.doors.all()
door_geometries = cascaded_union(tuple(d.geometry for d in doors))
section_geometry = cascaded_union((space_geometries['normal'], building_geometries, door_geometries))
section_geometry = section_geometry.difference(hole_geometries)
section_clip = svg.register_geometry(section_geometry, defid='section', as_clip_path=True)
@ -139,7 +141,7 @@ class Section(SpecificLocation, EditorFormMixin, models.Model):
svg.add_geometry(wall_geometry, fill_color='#929292', stroke_color='#333333', stroke_width=0.07)
# draw doors
door_geometries = cascaded_union(tuple(d.geometry for d in self.doors.all()))
door_geometries = cascaded_union(tuple(d.geometry for d in doors))
door_geometries = door_geometries.difference(space_geometries['normal'])
svg.add_geometry(door_geometries, fill_color='#ffffff', stroke_color='#929292', stroke_width=0.07)