[PostGIS] #5812: ST_Within performance regression

[PostGIS]

#5812: ST_Within performance regression
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 Reporter:  pramsey  |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 3.5.1
Component:  postgis  |    Version:  3.5.x
 Keywords:           |
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 ST_Within is far slower than the equivalent ST_Contains, due to a mistake
 in the prepgeom caching handling.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5812>
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