[postgis-tickets] [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 2.2.3
 Component:  topology  |    Version:  2.2.x
Resolution:            |   Keywords:  performance
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Comment (by strk):

 Another great idea (for topology): DROP the distance computation.
 Given that distance is only used to reduce the number of ST_Snap
 operations, and that ST_Snap would be a no-op if no vertex is closer than
 the given tolerated distance... we might as well just avoid to perform the
 pre-flight check.

 The testsuite is fine with that, which is a good sign!

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3587#comment:33>
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