[postgis-tickets] [PostGIS] #3587: lwgeom_mindistance2d slows down topology loading

[PostGIS]

#3587: lwgeom_mindistance2d slows down topology loading
-----------------------+---------------------------
  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 2.2.3
 Component:  topology  |    Version:  2.2.x
Resolution:            |   Keywords:  performance
-----------------------+---------------------------

Comment (by strk):

 PostGIS 1.4 is actually worst:

 {{{
 pg14=# select st_intersects(a,st_buffer(b,10)) from slowdist;
  st_intersects
 ---------------
  f
 (1 row)

 Time: 69.658 ms
 pg14=# select st_intersects(st_buffer(a,10),b) from slowdist;
  st_intersects
 ---------------
  f
 (1 row)

 Time: 423.872 ms
 pg14=# select st_dwithin(a,b,10) from slowdist;
  st_dwithin
 ------------
  f
 (1 row)

 Time: 13152.853 ms
 }}}

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3587#comment:13>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.