That's good to know, Darafei. Can you provide a data example that we can use for doing performance testing?
I'm not seeing that JTS buffer(0) is slower than union() on a random triangulation. So perhaps either your dataset has some different characteristic, or possibly GEOS buffer has different performance characteristics to JTS. On Tue, Apr 16, 2019 at 5:27 AM Darafei "Komяpa" Praliaskouski < m...@komzpa.net> wrote: > Hello, > > >> Ultimately I think the ideal approach is going to be abandoning >> CascadedUnion and switch to a full union algorithm (which will essentially >> be the same as running buffer(0). This should have very good performance. >> > > We're using PostGIS's ST_Union to dissolve a clipped TIN into a polygon. > Current ST_Union implementation handles this measurably faster than > ST_Buffer(ST_Collect(geom),0). Please keep this case in mind. > > > -- > Darafei Praliaskouski > Support me: http://patreon.com/komzpa > _______________________________________________ > geos-devel mailing list > geos-devel@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/geos-devel
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