[PostGIS] #3587: lwgeom_mindistance2d slows down topology loading

[PostGIS]

#3587: lwgeom_mindistance2d slows down topology loading
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  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS Fund Me
 Component:  topology  |    Version:  2.2.x
Resolution:            |   Keywords:  performance
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Comment (by strk):

 It's useful to note that subdividing the lines before adding them into the
 topology has a great benefit in term of load time. Using `ST_Subdivide` to
 split them to have at most 256 vertices makes the whole data load in under
 30 seconds, with no change in the PostGIS code (so it would compare to the
 17 minutes run).
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3587#comment:49>
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