[postgis-tickets] [PostGIS] #3321: Performance regression in topology load

[PostGIS]

#3321: Performance regression in topology load
-----------------------+---------------------------
  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 2.2.0
 Component:  topology  |    Version:  trunk
Resolution:            |   Keywords:
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Comment (by strk):

 Confirmed:
 {{{
 -- limit 20k offset 0  real    7m27.072s [2.2.0dev]
 -- limit 20k offset 0  real    3m11.396s [2.1.9dev]
 -- Query:
 SELECT DropTopology('million_poly_topo1');
 SELECT CreateTopology('million_poly_topo1');
 SELECT count(*) FROM (
   SELECT TopoGeo_addPolygon('million_poly_topo1', ST_GeometryN(geom,1))
   FROM ( select * from million_poly_topo1
     order by gid limit 20000 offset 0
   ) foo
 ) bar;
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3321#comment:1>
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