#997: ST_Union performance degradation from GEOS 3.6.x -> 3.7.x
-------------------------+---------------------------
Reporter: greenlaw | Owner: geos-devel@…
Type: defect | Status: new
Priority: major | Milestone:
Component: Default | Version: 3.7.0
Severity: Significant | Resolution:
Keywords: union |
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Comment (by pramsey):
I have reduced the problem to the minimum number of geometries. With the
uniontest table from
https://www.dropbox.com/s/la1g0xbvbdc849l/uniontest.sql.gz?dl=1 you can
run
{{{
SELECT ST_Union(geom) FROM uniontest
}}}
and see the effect. It's quite particular to these geometries. On that
basis I am not going to delay the 3.8.0 release, and hope we can find the
particular cause of the regression to patch up 3.8.1 and the 3.7 branch.
--
Ticket URL: <https://trac.osgeo.org/geos/ticket/997#comment:5>
GEOS <http://trac.osgeo.org/geos>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite
(JTS).
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